Sixteen years ago, Sylvie's sister. Persephone, never came home. Out late with the boyfriend she was forbidden to see, Persephone was missing for three days before her body was found - and years later, her murder remains unsolved. In the present day, Sylvie returns home to care for her estranged mother, Annie, as she undergoes chemotherapy. Once there, Sylvie discovers that Persephone's former boyfriend, Ben, is now a nurse at the cancer center where Annie is being treated. Sylvie has always believed Ben was responsible for the murder - but she carries her own guilt about that night, and as she grapples with the past, Sylvie begins to uncover the secrets that fill her house, along with what really happened the night Persephone died.