Something is wrong with Samantha McCallister. Her baby brother is dead, and she has only one memory of the accident: the canned version her parents impressed upon her. But Sam struggles to make sense of it. Cast aside by her self-involved family, Sam seeks out a friendship with the next-door neighbor, Hazel, until Hazel inexplicably goes missing, leaving nothing but a note and a jar of jam. Determined to uncover the truth about Hazel's disappearance, Sam finds out more than she bargained for.