CAPE COD, 1969: It was supposed to be a fun and relaxing girl's weekend in Provincetown for Patricia Walsh and Mary Anne Wysocki. They couldn't have known that helping a friendly stranger in their boarding house would put them into the orbit of a killer.

These are the stories of Pat Walsh, Mary Anne Wysocki, Sydney Monzon, and Susan Perry.

The Babysitter by Liza Rodman and Jennifer Jordan

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