To investigate a shipwreck, Kitaro visits a port city alone, but none of the residents will talk to him. Kitaro pushes ahead with his investigation, but Ratman's betrayal causes him to be caught by a giant squid. Merpeople appear! The shipwreck was their doing. Kitaro fights desperately, but the merpeople use deep sea youkai techniques to change their form and...!?
A monster did it!
!فعل ذلك وحش
Ein Monster hat uns erwischt!
Un monstre a fait ça !
Siamo stati colpiti da un mostro...
Foi um monstro que fez isso!
Это дело рук чудовища!