A group of friends embark on a lavish bachelor party trip to a secluded island in the Caribbean, expecting nothing but a fun and carefree time together. As they explore their surroundings, they come across a seemingly pristine beach and an abandoned research facility. Curiosity soon gets the better of them, leading to the accidental release of a deadly, flesh-eating virus. Unbeknownst to them, the island harbors a dangerous secret once held in quarantine by its former inhabitants. As they begin to fall ill, the friends realize the severity of their situation and the true purpose of the research facility.

Panic escalates as the virus rapidly consumes its victims, leaving behind grotesque symptoms and deadly outcomes. In their desperate bid for survival, the group faces internal conflicts and starts turning on each other, fueled by fear and distrust. Meanwhile, a man with immunity to the virus becomes their only hope, but his intentions remain unclear. The fight for survival against the highly contagious virus transforms into a horrendous nightmare as the friends must navigate through infected zones and their own deteriorating sanity. The island becomes a relentless death trap, presenting challenges that force them to confront not only the viral outbreak but also their own primal instincts.