As Saint Marie celebrates Day of the Dead, the organiser of the charity auction at the yacht club, Daisy Anderson, is murdered after sending a panic-stricken message to her husband, Finn. Jack and the team discover that Daisy had an affair with yacht club member Adam Warner, which Finn knew about and was filing a divorce over. However, all of the suspects in the case have alibis. After noticing a butterfly on Daisy's body which should be in hibernation, Jack is provided with a big clue over Daisy's murder.
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