It's a perfect beach day, or so thought the family, young couple, a few tourists, and a refugee at the same secluded, idyllic cove filled with rock pools and sandy shore, encircled by green, densely vegetated cliffs. But this utopia hides a dark secret. When a woman's dead body is founding floating in the crystal-clear water, the thirteen strangers band together to unravel the mystery of the cove - and soon find they best concentrate on how to get out alive themselves!