Dimension 5 1966

Justin Power, Jeffrey Hunter, an agent for Espionage, Inc., returns from a mission where he used a time-travel belt to steal secret plans. He is told by his superior, Cane, Donald Woods, that he is to be teamed with a Chinese agent to take down the Dragon crime ring led by Big Buddha, Harold Sakata. A sister agency has learned Dragon plans to destroy Los Angeles if United States forces withdraw from Southeast Asia.

Aware that Dragon has a primitive hydrogen bomb but no clear delivery method, Espionage, Inc plans to interrogate a captured agent, Chang, Gerald Jann. Chang is being brought from Hong Kong by two agents—Sato, Robert Ito, and George, Robert Phillips—so they might learn Dragon’s plans. Chang insists that Dragon will see to it that he will never talk. An assassination attempt occurs immediately: though George is killed, Chang survives when a female agent shoots the assassin with a dart.

Informed of the incident, Power goes to Ontario Airport where he uses his time-travel device to “preview” the assassination. A man in a cowboy suit shoots Chang with a dart gun concealed in a camera, while Sato and the female agent watch helplessly. The shooter then escapes in a limousine with Big Buddha in the back seat. Power then switches to the present, warns Sato by radio of the threat, and orders the limousine be prevented from following their taxi, before punching out the would-be killer and ensuring the transfer is made successfully.

Back at headquarters, the Professor, Jon Lormer, and his assistant, Miss Sweet, Deanna Lund, subject Chang to a truth machine that forces him to reveal what he knows—at the risk of brain damage. During the process, Chang switches to Chinese and Sato translates. The interrogation reveals that a hydrogen bomb is being delivered piece-by-piece and assembled in Los Angeles, with an explosion planned for Christmas Day, three months away. Power then meets his new partner, Ki Ti Tsu, Kitty, France Nuyen, the agent who aided during the Hong Kong assassination attempt.

Power takes Kitty to a Cantonese restaurant run by an old friend, Kim Fong, Kam Tong. He asks Fong about the black market (Power’s cover is an importer) and offers help, until Big Buddha is mentioned. Kitty’s hostess, Nancy Ho, Linda Ho, recognizes Kitty as a Chinese agent and forces Fong to hand over a bomb disguised as an owl-shaped incense burner. Kitty is suspicious for cultural reasons and because she recognizes the hostess as a Dragon agent. The pair are out of the car when the bomb explodes.

Later, Power confronts Nancy Ho at her hideout, demanding the bomb’s location. Ho is killed by Kitty as she tries to stab Power. Kitty then turns Power over to Dragon agent Stoneface, a ruse that allows Kitty to meet with Big Buddha while signaling headquarters. Power is rescued, and he demonstrates the time-travel belt to Kitty, warning her to limit travels to places that will still exist in the future or past.

Power receives a message from Cane and learns that the Ming company—the maker of the owl bomb and a Dragon front—has a warehouse in Long Beach, with a shipment from Hong Kong aboard the Osaka Maru due in three weeks. Power and Kitty time-travel ahead the three weeks, unaware that they are being watched. When Stoneface wants to kill them with a disintegrator, Big Buddha has him killed instead.

Inspecting the warehouse in the future, Power and Kitty discover Uranium-238 among Christmas decorations, but are discovered by Big Buddha, who has been expecting them for the last three weeks. Restricted to locations he can see, Power bounces between barrels as Dragon agents close in. Kitty confronts Big Buddha, seeking revenge for his war crimes during the Nanking Massacre, including the deaths of her parents seven years earlier, but she is captured. Power surrenders to Big Buddha to buy Kitty time. The plan is to ship Power to Hong Kong to extract secrets from him.

Unexpectedly, Big Buddha’s mute servant girl, Virginia Ann Lee, tries to stab him. Power seizes the distraction to turn on Big Buddha’s bodyguard, Genghis, Lee Kolima, and a brutal fight erupts. The much larger Genghis overpowers Power until Kitty tosses him a gun, which Power uses to shoot Genghis down. Big Buddha, meanwhile, has forgotten about his servant girl, who finally seizes her moment and finishes him off.

Power and Kitty return to the present with knowledge to stop Dragon once more, but this time they intend to let Cane’s people do all the work, ending their immediate threat without needing to rely on time travel.