Newly married couple Marcus and Emily invite their uninhibited besties Ron and Kyla to join them for a vacation when Marcus lands an all-expenses-paid trip to a Caribbean resort. When Kyla’s incarcerated father Reese is released and shows up at the resort unannounced, things get out of control, upending Marcus’ best laid plans and turning the vacation friends’ perfect trip into total chaos.

A beautiful island is home to thousands of species of aquatic life. Now there is a new species: the 5-Headed Shark is all heads and teeth. Shaped like a demented starfish, this monster terrorizes the open ocean before invading the beaches of Puerto Rico, endangering the once peaceful island paradise.