People living in a seaside town are frightened by reports about an unknown creature in the ocean. Nobody knows what it is, but it's really the son of Doctor Salvator. The doctor performed surgery on his son and now young Ichtiandr can live underwater. This gives him certain advantages, but creates a lot of problems.—Boris Shafir <[email protected]>

In a coastal state, a mysterious fish-man is considered a devil fish that is scaring the local pearl divers. The wealthy Pedro Zurita uses his vessel to catch pearls and his first mate Baltazar owes a lot of money to him . He wants his daughter Guttiere Baltazar to get married with him and resolve his father's debts. When Guttiere is attacked by a shark on the sea, the amphibious man saves her. However, Pedro assumes the credit for her rescue, but the amphibious man falls in love with Guttiere. Meanwhile, Doctor Salvator discloses to the journalist Olsen that the amphibious man is indeed his son Ichtyandr Salvator that had a serious lung problem and was transplanted with gills to survived living in the sea. Ichtyandr and Guttiere falls in love with each other, but Pedro is no going to make their life easy.—Claudio Carvalho, Rio de Janeiro, Brazil