As a favor to her neighbor's sister, she becomes embroiled in investigating the disappearance of a teenage girl. When the girl is later discovered drowned at Elk Lake, the police assume it is another case of a runaway suicide. But her grandmother refuses to believe that she could have killed herself and hires Sam to get to the bottom of it. With the help of her roommate Gabby and their two Old English sheepdogs, they try to discover who is responsible for the girl's death.