Elisa is late to pick up her daughter Lucia from school when Rebecca, the mother of Lucia's new friend, suggests a sleepover for the girls. When she goes to pick Lucia up the next morning, she discovers Lucia's missing.

Elisa and Fred are in limbo as the police speculate that an organized criminal gang might be involved. Meanwhile, a mysterious prisoner, Marcus Turner, collects news clippings about Lucia's disappearance, and Fred's behavior is suspicious.

A flashback shows Rebecca preparing to abduct Lucia in Southern France, and in the present day, she reveals shocking news to Lucia. Meanwhile, Selma continues to investigate Elisa and discovers her dark past.

Selma discovers a secret buried deep in Elisa's past that could unlock the search for Lucia.

Long-held secrets are finally revealed as Elisa embarks on a race against time to save Lucia.