On a sweltering island in the South Seas, a young drifter takes a temporary post with a pearl trader. But when a stranger's eyes appear at the window just after a valuable shipment arrives, an uneasy night turns into a nightmare. A vicious attack leaves only one survivor-badly wounded and adrift on the open sea.
Awakening to find himself lashed to a sinking boat, he discovers a cryptic key hidden on board, a clue that may lead to the truth behind the brutal crime. As he battles thirst, injury, and the relentless sun, he must summon every ounce of resilience to survive-and to hunt down the killers who left him for dead.
But the key holds a secret that could plunge him into even greater danger. The hunt is on, and the devil's mantle has only begun to spread its shadow.