A tropical singles retreat takes a terrifying turn when guests realize a poisonous shark is infesting the surrounding water. Not only will it rip apart its victims, but it also uses projectile acid to hunt - in and out of the water.

Off the coast of Puerto Rico, the tropic singles resort of the shady entrepreneur, Reese, becomes a pole of attraction to tanned young holidaymakers, and an unseen underwater menace. With the toxicity levels in the water rapidly rising, and the staff mysteriously disappearing, Sam reunites with his former girlfriend, Eden, in the sunny retreat, unbeknownst to them that a "dirty" shark has already infected one of their mutual friends. Now, as if being the ocean's deadliest predator weren't enough, this particular shark is also poisonous. Who can survive the brutal attack and the bite of the Toxic Shark?—Nick Riganas