Soratobu Yuureisen

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. But then Hayato stumbles on a secret underground factory of Mr. Kurosio, owner of mostly everything in the city - and realizes things are not as Mr. Kurosio has been telling him... Someone terrible lives in a castle under the sea... Hayato is trying to tell people the truth - but his life is...