As cody tries to get back to the surface he notices his legs are moving funny he looks down to see a MERMAN tail where his legs should be,he can't go back looking like a merperson, so he sets off to find answers,leaving his family,friends and dreams behind,cody sets off on the advednture of a lifetime

As Cody travels the ocean he notices a mermaid being chased by monsters with with stingray heads