Hinako is a surf-loving college student who has just moved to a small seaside town. When a fire breaks out at her apartment building, she is rescued by Minato, a handsome firefighter, and the two soon fall in love. Just as they become inseparable, Minato loses his life in an accident at sea.

Set in futuristic Metro City. When a brilliant scientist's young son dies, he secretly creates a powerful robot boy he names Astro Boy. Unable to fulfill the grieving man's expectations, Astro Boy embarks on a journey in search of acceptance. Along his way he experiences betrayal and a netherworld of robot gladiators, before he returns to save Metro City and reconcile with the father who had rejected him.