A missing husband, a sister acting sus, and a tantalizing tangle of lies--well, there goes Remi's plan for a chill Halloween.

Remi and her sisters, Maeve and Eliana, have a knack for stumbling into murder mysteries. And after a killer family camping trip last year, they're back together for a Halloween they'll never forget.

Remi is living her best life in Seattle until Eliana's husband, Chad, who refused to sign their divorce papers, disappears on the spookiest night of the year. Eliana swears she has no idea where he is, though her obvious motive and weird behavior don't really weigh in her favor. Nor does the severed finger they find in his house...

Torn between loyalty to her sister and mounting suspicions she can't ignore, Remi and her boyfriend, Leo, embark on a manhunt to find Chad--or the rest of him. But the further Remi digs into Chad's movements on Halloween, the more trouble she finds. With a ruthless detective on their tail, threatening texts, a mysterious flash drive, and dubious legal advice from a kooky aunt, the Finch sisters are in over their head. But Remi is determined to prove her sister's innocent, even though the bloody evidence points right at her.