In an unexplored area of the Caribbean, far from sea routes, lies a secluded island surrounded by a graveyard of lost ships. This is where the Antoinette, a cargo ship of arms dealers, is supposed to meet with buyers from Central America. Arriving at the rendezvous, the Antoinette crew does not find their partners in the deal there, but they encounter creatures unknown to science, whose eerie singing echoes throughout the outskirts of the island. With the onset of darkness, these creatures crawl out of the water, and the time for a bloody hunt begins for them...