Hayato's city is devastated by a giant robot, his parents are killed in the massacre. The only friend left to him is his dog Jack, the only things left are mom's shoe and a picture of a man and a woman who, as his father tells him on his deathbed, are his real parents. Now Hayato wants revenge on the one who is said to have sent the robot: the terrible Ghost Ship which threatens ships and is rumored to wish to exterminate everything.

(Source: Anime News Network)