When Karina becomes friends with Lena and her daughter Mallie, she begins to suspect that Mallie isn't Lena's daughter at all, but a girl named Emily who was kidnapped from her biological parents years ago.

No aniversário de Sarah, sua melhor amiga Victoria lhe dá um kit de teste genético de presente. Mas naquela noite, Victoria morre. Semanas depois, Sarah recebe a visita da polícia.