Shin Kamen Rider: Prologue 1992

ISS begins genetic research

The Institute of Super Science launches aggressive experiments to strengthen the human body in an effort to cure AIDS and cancer. Doctors Kazamatsuri and Onizuka supervise the early trials while securing funding from a shadowy syndicate. Shin Kazamatsuri volunteers to be the first test subject, driven by loyalty and the promise of medical breakthroughs.

Shin volunteers as test subject

Shin, a motorcycle racer and the doctors' son, volunteers to participate in the experiments as part of the initial testing phase. He hopes to contribute to medical progress and prove himself to his father. The team begins the first round of trials, documenting results and side effects.

Syndicate funding and hidden motives

The operation is secretly financed by a syndicate that intends to weaponize enhanced bodies as mutant cyborg soldiers for their own gain. They manipulate the project from behind the scenes, keeping the true purpose hidden from the doctors and Shin. This covert backing creates a dangerous conflict of interest and raises ethical stakes.

Onizuka's secret pursuit

Onizuka harbors a radical ambition: fuse grasshopper DNA with human subjects to birth a new species and perhaps a godlike civilization. He believes this evolution could grant him immense power and redefine humanity. He tests his ideas on himself and sees greater early results with Shin as a subject.

A creature stalks the city

A creature begins stalking the city, killing people, and the murders terrify the population. Shin dreams of that creature, blurring the line between dream and reality and making him doubt his own involvement. The link between the killings and the experiments remains unclear, driving the suspense.

Telepathic link and revelations

The grasshopper-derived telepathy allows the creature to communicate with Shin, pulling him into the murders' mystery. Shin initially believes he is responsible for the killings, but the telepathic connection hints at a deeper link to Onizuka's work. The revelation deepens the mystery and tests Shin's trust in his own mind.

Shin uncovers Onizuka's plan

Shin uncovers that Onizuka is behind the killings and that his radical project stretches far beyond standard experimentation. The discovery makes Shin a witness to a threat that others refuse to acknowledge, tying the murders to the laboratory's work. He realizes the scope of the conspiracy and the danger it poses to innocent people.

Syndicate moves against Onizuka

The syndicate learns of Onizuka's radical plans and decides that he must be controlled, institutionalizing him to stop his experiments from spiraling out of control. This move demonstrates the syndicate's willingness to wield power over scientists when their interests are at stake. The fallout raises questions about who truly decides right from wrong.

CIA agent tracks Shin

A CIA agent tracks Shin and intends to eliminate him, unaware of the true threat his connection to the experiments could pose. Her mission is clouded by limited information and political agendas, making the pursuit tense and morally ambiguous. The conflict between national security and supernatural scientific advances intensifies the danger around Shin.

Shin investigates the experiment

Shin refuses to stay hidden and begins digging into the origin of the project. He searches for answers about the grasshopper DNA, the experiments, and the people behind them. The more he learns, the more repulsed he becomes, yet his determination to uncover the truth grows.

Onizuka's transformation

Onizuka has experimented on himself and altered his genes, becoming a humanoid grasshopper. The transformation signals the dangerous potential of the research and foreshadows a climactic confrontation. It also demonstrates how far the syndicate's influence has reached into human biology.

The grasshopper telepathy continues

The grasshopper's telepathic abilities enable it to communicate with Shin, making him a direct witness to the murders. This bond deepens Shin's involvement and raises questions about free will and responsibility. The dynamic between Shin, Onizuka's altered biology, and the killings drives the story toward a tense escalation.