2112 th year of our era. Earth has experienced many catastrophes, civilization desperately clings to the disparate pieces of sushi. On one of the islands lives with his grandfather boy named Mangchi. This groovy tomboy everywhere to carry a hammer,for which he received the nickname " Hammerboy " (" boy - hammer "). When on his island crashes unknown ship with a charming princess on board, it becomes the protector Hamerboy mysterious beauty. Together they will survive the incredible and dangerous adventures!