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Read the complete plot summary and ending explained for Monkey King: Hero Is Back (2015). From turning points to emotional moments, uncover what really happened and why it matters.
The all-powerful Monkey King, Sun Wukong, is imprisoned by the Buddha within an ice cage deep in the mountains after rebelling against Heaven.
Five hundred years later, Mountain Trolls attack a group of travelers, killing everyone except for a baby boy named Jiang Liuer, who is adopted by a monk after floating down a river in a basket. Several years later, the same trolls invade a small village and kidnap 49 young children. Liuer saves one of the baby girls and is chased by the trolls for doing so. He stumbles into the cave where the Monkey King was imprisoned and unknowingly releases him from his curse. Sun Wukong defeats the trolls, but he can only use physical attacks, as a remnant of Buddha’s seal prevents him from regaining his magical powers, causing him pain whenever he tries to harness his magic.
Wukong attempts to break the Buddha’s seal, but to no avail. Liuer and the girl enthusiastically greet Wukong, unaware that he has lost his powers, and pester him with endless questions. When Liuer asks if the god Nezha is a boy or a girl, Sun Wukong replies, “a girl.”
“a girl.”
A stone monster, created by the Buddha to keep Wukong imprisoned, attacks the three. Liuer manages to undo the spell on the monster but falls off a cliff in the process. When he awakens, he discovers that Wukong has saved him.
They encounter Pigsy, the Heavenly Immortal “Tian Peng Yuan Shuai” (Marshal of Heavenly Canopy), whom Wukong defeated 500 years ago and who is now reincarnated as a pig demon. Although Wukong is initially hesitant, Pigsy joins the group. They also run into a white dragon that attacks them and tries to eat Liuer, but Sun Wukong scares it off. (This also occurs in the original canon, although, unlike in the original books, the dragon does not turn into a white horse.)
They stay overnight at an inn, but its owners turn out to be trolls in disguise who try to kidnap the baby. More trolls arrive, and Wukong fights them off. The leader of the monsters, Hun Dun, appears, defeating Wukong and capturing the girl. After Wukong refuses to pursue them, Liuer decides to go ahead and save them on his own.
Hun Dun reveals his plan to sacrifice all the children they have kidnapped in order to gain magical powers. Liuer meets with his mentor, Fa Ming, to try to rescue them but nearly gets captured. Wukong finds a doll of himself that Liuer had and realizes how important he is as a figure. He and Pigsy go to help Liuer. After saving Liuer and the 49 children, Wukong defeats the monsters. However, a solar eclipse occurs, and Hun Dun transforms into a giant monstrous beast. Liuer is seemingly crushed by the rubble from Hun Dun’s rampage. Upon seeing the boy’s apparent death, Sun Wukong is devastated. Full of fury, he forcibly breaks Buddha’s seal, regaining his original supernatural powers, and easily defeats Hun Dun.
The final part of this movie connects to the themes in the original canon. Sun Wukong only regains his powers when he fights for someone else rather than for himself, as his powers are meant to protect the monk Xuanzang/Tang Seng/Tang Sanzang against evil and lead him to enlightenment. Sun Wukong as a character is also meant to represent an enlightened mind, which is why his staff emerges from his head. Jiang Liuer himself is the younger Xuanzang, as he only received the name Xuanzang after he was ordained.
In the end, Liuer is shown to have survived Hun Dun’s rampage, and they return the abducted children to their families.
Follow the complete movie timeline of Monkey King: Hero Is Back (2015) with every major event in chronological order. Great for understanding complex plots and story progression.
Wukong is imprisoned by Buddha
The Monkey King Sun Wukong rebels against Heaven and is imprisoned by the Buddha inside an ice cage deep in the mountains. The seal strips him of his magic and power, leaving him trapped for centuries. His punishment sets the stage for the events that follow far in the future.
Troll attack and Liuer's survival
Five hundred years after Wukong's imprisonment, Mountain Trolls attack a group of travelers. Everyone is killed except a baby boy, Jiang Liuer, who drifts down a river in a basket and is adopted by a monk. His life is shaped by this survival and new guardianship.
Village raid and freeing the cave
Trolls invade a small village and kidnap 49 young children. Liuer saves one baby girl and is chased by the pursuing trolls. He stumbles into the cave where Wukong is imprisoned and unknowingly releases the Monkey King.
Wukong's futile attempt to regain power
After his release, Wukong defeats some trolls but cannot use his magical powers due to Buddha's seal. He endures pain whenever he tries to harness magic, remaining bound by the remnants of the ancient spell.
First greetings and questions
Liuer and the rescued girl greet Wukong warmly, unaware that he has lost his powers. They pepper him with questions, including one about Nezha's gender, which Wukong answers with humor before their peril resumes.
Stone monster attack and rescue
A stone monster created by the Buddha attacks the trio. Liuer manages to undo the spell on the monster but falls off a cliff in the process. Wukong arrives in time to save him from the fall.
Meeting Pigsy
They encounter Pigsy, the Heavenly Immortal Marshal, who was defeated by Wukong five centuries ago and is now reincarnated as a pig demon. Wukong is hesitant at first, but Pigsy eventually joins the group.
Dragon encounter
A white dragon attacks the group, attempting to eat Liuer. Wukong scares the beast away, proving his protective power even without full magic. Unlike other tellings, the dragon does not turn into a white horse here.
Inn of disguise and Hun Dun's capture
The travelers stay at an inn that is revealed to be run by trolls in disguise. More trolls arrive, and Wukong fights them, but Hun Dun defeats him and captures the girl. The group prepares a plan to rescue them.
Liuer seeks help from Fa Ming
Liuer decides to rescue the abducted children and seeks assistance from his mentor Fa Ming. He nearly gets captured while pursuing the plan, underscoring the danger of Hun Dun's threat.
Wukong and Pigsy prepare to intervene
Wukong discovers a doll of himself that Liuer had, recognizing his symbolic importance as a figure. He and Pigsy set out to help Liuer and the kidnapped children.
The rescue and the eclipse
Wukong and Pigsy succeed in rescuing Liuer and the 49 children. Hun Dun transforms into a giant beast during a solar eclipse, and Liuer appears crushed by the wreckage. Wukong is filled with fury but remains determined to save them all.
Wukong regains power and defeats Hun Dun
Moved by Liuer's apparent death, Wukong forcibly breaks Buddha's seal and regains his original powers. He defeats Hun Dun with ease, reaffirming that his strength comes from protecting others.
Liuer survives and returns the children
Liuer is shown to have survived the rampage, and the children are returned to their families. The story echoes the canon by revealing Liuer as the younger Xuanzang, with Wukong embodying the enlightened mind that guards and guides toward enlightenment.
Explore all characters from Monkey King: Hero Is Back (2015). Get detailed profiles with their roles, arcs, and key relationships explained.
Sun Wukong (Zhang Lei)
The all-powerful Monkey King who’s imprisoned by the Buddha. He loses his magical powers due to an ancient seal, but remains fiercely protective and daring, gradually regaining his strength by choosing to fight for others instead of himself.
Jiang Liuer (Lin Zijie)
A young boy who is orphaned and adopted by a monk. He acts as the catalyst for Wukong’s release and becomes a brave figure who believes in doing the right thing, even in danger.
Pigsy (Liu Jiurong)
The Heavenly Immortal turned pig demon who joins the group. Brash and humorous at times, he becomes a loyal ally whose strength and stubbornness complement Wukong’s wisdom.
Hun Dun (Tong Zirong)
Leader of the invading trolls who seeks to harvest magical power by sacrificing children. A formidable, monstrous adversary embodying the film’s darkest threat.
Fa Ming (Wu Wenlun)
A monk mentor who guides Liuer and helps coordinate the rescue. His presence anchors the group's pursuit and reinforces themes of wisdom and guardianship.
Old Monk (James Hong)
An ancient monk who once imprisoned Wukong and now serves as a guiding voice for the group. His actions anchor the film’s connection to the original myth.
Lady Troll (Wu Di)
A troll in disguise who runs the inn and aids Hun Dun’s plan to abduct children. She embodies the deception and danger that permeates the journey.
Learn where and when Monkey King: Hero Is Back (2015) takes place. Explore the film’s settings, era, and how they shape the narrative.
Time period
Ancient mythic era, around 500 years after Sun Wukong's imprisonment
The events occur in a mythic, ancient world where gods, immortals, and magical creatures inhabit the landscape. The narrative spans generations, from Wukong's imprisonment to Liuer's era and the mission to save the abducted children. The setting emphasizes a timeless, fantastical period rather than modern times.
Location
Mountains, cave prison, village, inn
The story unfolds across a rugged mountain landscape where Sun Wukong is imprisoned in an ice cage. A village sits at the mountain's edge and travelers pass through an inn before Trolls attack. A hidden cave houses the Buddha's seal and the Monkey King's prison, while rivers and forest paths lead to confrontations with ice trolls and the eventual rescue of Liuer and the children.
Discover the main themes in Monkey King: Hero Is Back (2015). Analyze the deeper meanings, emotional layers, and social commentary behind the film.
🕊️
Selflessness
Power awakens in Sun Wukong only when he fights for others. His final surge comes as he protects Liuer and the kidnapped children, not for personal glory. The staff's emergence symbolizes an enlightened mind that chooses defense over domination.
🤝
Friendship
Liuer's courage earns Wukong and Pigsy's trust, binding them into an unlikely alliance. Their teamwork under pressure shows how companionship can overcome fear and past rivalries. The group dynamic becomes essential to rescuing the children and thwarting Hun Dun.
⛓️
Imprisonment
Wukong's seal by Buddha keeps him powerless, a test of restraint and discipline. A stone monster created to guard the king mirrors the film's theme of captivity. Breakthroughs come only when Wukong aligns with protecting others.
🧒
Protection of Innocents
Hun Dun intends to sacrifice the kidnapped children for power, setting the stakes high. Liuer's decision to venture forward and the group's rescue of the 49 children center the narrative on safeguarding the vulnerable. The ending reaffirms community, family, and returning the children to their families.

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Discover the spoiler-free summary of Monkey King: Hero Is Back (2015). Get a concise overview without any spoilers.
In a realm where ancient myths cling to mist‑shrouded peaks, an all‑powerful figure once ruled the heavens before being sealed away in an icy cavern high above the world. The atmosphere is thick with legend and a lingering chill, giving the landscape a timeless yet uneasy feel—as if the mountains themselves are holding their breath, waiting for something to stir. This forgotten deity, known in stories as the Monkey King, carries both the weight of his former glory and the lingering echo of a divine punishment that still binds him.
Below the frozen heights, a small village clings to survival, its daily rhythm punctuated by the ever‑present threat of unseen dangers that linger in the surrounding woods. Into this precarious peace wanders a young child, rescued from the river and raised far from his origins, who feels an inexplicable pull toward the towering peaks. When the boy inadvertently frees the imprisoned legend, the encounter ignites a delicate and unexpected partnership. The child’s wide‑eyed curiosity and innate courage contrast sharply with the Monkey King’s lingering pride, setting up a dynamic where innocence meets ancient power.
The film’s tone balances sweeping, mystical action with moments of light‑hearted wonder, allowing the audience to feel the awe of mythic spectacle while staying grounded in the characters’ personal journeys. As the newly reunified duo steps back toward the villagers, the story hints at a deeper purpose: a chance for the Monkey King to rediscover his lost strength, not for his own glory, but to shield those who cannot protect themselves. The child’s unassuming encouragement becomes the catalyst for a transformation that promises both adventure and heart, inviting viewers to wonder how a legend and a humble youngster will reshape each other’s destinies.
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