Grade schooler Yuuta Tomonaga stumbles upon Deckerd, a humanoid robot under construction by the Japanese police, built to fight advanced forms of crime. Yuuta's constant contact with Deckerd gives the robot a "heart," or personality; when Yuuta is recruited as the "boss" of the "Brave Police" as a result, a true human/robot partnership occurs.

The very first original animated video produced by Tezuka Productions about an agent who was sent riding on Halley's comet to the Earth. He was actually, though, given the order to destroy the Earth. Captivated by planet's beauty, however, he is no longer able to destroy the planet. Seventy-six years later, another agent from Halley's comet is sent to the earth to liquidate this traitor, who is now disguised as a girl named Lamina in Vietnam. Tezuka Osamu oversaw only the original story.

Based on the Hudson Soft game.