Cabin Fever: Patient Zero (2014)

Plot

A group of friends embarks on a surprise bachelor party getaway to a remote Caribbean island, expecting a night of fun and relaxation. However, they quickly learn that the island conceals a hidden medical facility, and their plans take a terrifying turn. As they explore, they realize the surrounding waters harbor a deadly infection, threatening their lives. With the clock ticking, they must confront the horrifying truth behind the island and fight to survive against an unseen enemy. The celebration morphs into a nightmare as they grapple with the consequences of their ill-fated adventure.