When Silas Reed returns to the isolated Greyfriar Island for the reading of his adoptive father's will, he expects nothing more than a bitter family reunion. Instead, he becomes the unexpected heir to a vast fortune, instantly turning three desperate siblings into dangerous rivals. Trapped inside a decaying Gothic mansion by an unforgiving storm, they must endure seventy-two hours together before the inheritance can be claimed. But the estate hides far darker secrets than greed alone. Hidden cameras, forgotten passageways, and a lifetime of meticulously collected surveillance reveal that the late patriarch orchestrated one final game from beyond the grave. As old betrayals surface and trust disintegrates, Silas realizes every conversation, every movement, and every lie may already have been anticipated. In a house built to watch its occupants, survival depends on uncovering the truth before the inheritance becomes a deadly sentence—and before the game claims its final winner.