“Andrea Mara is fantastic!” —Freida McFadden

Two children get on the train, but only one gets off in this gripping and twisty thriller from Andrea Mara, #1 international bestselling author of Someone in the Attic, It Should Have Been You, and the hit streaming series ALL HER FAULT

It’s a hot, sticky August morning on the London Underground platform. Sive pushes through the rush hour crowds and her two young daughters jump on the train ahead of her. As she tries to join them, the doors slide shut and the train moves away, leaving her behind. Frantic, Sive signals for them to get off at the next stop.

The four minutes until the next train are the most terrifying of her life. When she finally reaches the following stop, Sive expects her daughters will be waiting for her. But on the platform, she truly begins to panic: Only one child is standing there.

Has her other daughter gotten lost? Been taken by a passing stranger?

Or perhaps the culprit is closer to home than Sive thinks. No one is telling the truth, and the longer the search continues, the harder she will be to find. . . .