Ten years ago, a shadow ruined her life. Tonight, it's back for the rest.

Forensic investigator Evelyn Reed was the rising star of the force until the "Black Knight" case?a series of ritualistic, chess-themed murders?shattered her reputation and ended her career. A decade later, she is a ghost of her former self, invited to the remote Blackwood Isle for a retreat hosted by billionaire Arthur Vance.

But the sanctuary becomes a tomb when the island is cut off by a relentless storm. Arthur Vance is found dead inside his impenetrable biometric vault, sealed from the inside with no sign of entry. Resting beside his body is the one thing Evelyn never wanted to see again: a single, obsidian black knight.

Trapped with seven elite guests, each harboring lethal secrets, Evelyn must sharpen her dormant instincts to solve an impossible crime. As a killer begins picking off survivors like pieces on a board, Evelyn realizes this isn't just a murder?it's a meticulously crafted performance designed specifically for her. On Blackwood Isle, the game has begun again, and the Black Knight is playing for checkmate.