Ep. 3: Dubious Move episode details the mystery of Kinzo's disappearance and the locked room murders.

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Trapped on the island by a typhoon, the remaining guests find their radio broken and realize Kinzo is missing. Battler and the family suspect that one of the eighteen people present is impersonating Beatrice to claim Kinzo's inheritance. Suspects include the servants with mansion access, Natsuhi, who was last seen with Kinzo, and Eva, who stands to gain the most. Following a heated argument between Natsuhi and Eva, no definitive conclusion is reached, and everyone returns to their rooms. Later, Eva and Hideyoshi are discovered dead in a locked room with stakes embedded in their foreheads.