In the year 2003, Professor Tenma is distraught when his son Tobio is killed in a car accident. He loses himself in his latest project, creating Atom, a robot boy programmed to be forever good. Upset that his Tobio-substitute can never grow up, Tenma sells Atom to Ham Egg, the cruel ringmaster of a robot circus. Atom meets the kindly Professor Ochanomizu, who adopts him, inspires him to become a crusader against evil, and eventually builds him a robot "sister," Uran.

Summer arrives to Bokuto Station. Miyuki and Natsumi have to work on a beach road protecting the safety of the civilians that are enjoying their summer vacations. Suffering because of the hot, the two officers were having problems to remain calm, but then, some pickpocket appeared on the beach causing a ruckus. The girls will do their best to catch the thief, control the traffic and enjoy their summer day.

Cobra, a notorious space pirate, is enlisted by bounty hunter Jane to rescue her sister from the strange being known as Crystal Boy, but then finds himself drawn into a complex struggle over the fate of a mysterious wandering planet.

(Source: ANN)

The film's plot tells the story of how Satoshi and Pikachu came to know each other. Pikachu was not cooperative toward Satoshi, but Satoshi only wanted to be friends with Pikachu. On the day they set out from Masara Town, both of them saw a Ho-Oh flying and made a vow to someday go and meet it.

(Source: ANN, edited)