The story begins when Specter, a white-haired monkey at a monkey park, puts on an experimental Pipo Helmet created by a Professor, which increases his intelligence beyond that of a regular monkey, but also twists his mind, turning him evil. Imbued with this new power, Specter gives Pipo Helmets to all the monkeys in the park and sets them loose, having them take over the local laboratory where the Professor and his assistant Katie (Natalie/Natsumi) are currently building a time machine. As Spike (Kakeru) and his best friend Buzz (Jake/Hiroki) arrive at the laboratory, they find themselves transported by Specter, along with all the other monkeys, to the various reaches of time. Realising that leaving the monkeys to their own devices could rewrite history in disastrous ways, the Professor tasks Spike with finding all of the monkeys scattered across time and sending them back to the present. Spike must also face off against Specter, who has not only built himself an advanced Peak Point Helmet further increasing his own intelligence, but has also brainwashed Buzz to his side. After a lengthy series of captures and battles in segments of history ranging from the roam of the dinosaurs, medieval times and present day, Spike is eventually able to capture all of the apes. Spike chases Specter to his deranged theme park, where he is holding a recently captured Professor, Katie, and his friend Buzz. Spike frees Buzz of his mind control, and releases both the professor and Katie, and goes on to find Specter in an alternative universe he calls the "Peak Point Matrix". Spike defeats Specter after a final battle, and he is captured and sent back to the zoo.
—Cameron Iacono