The anthology series follows parents Sam (David Morrissey) and Gemma Webster (Keeley Hawes), whose daughter, Alice, went missing in 2003. Eleven years later, a young British woman stumbles through the streets of her German hometown and announces herself as Alice Webster (Abigail Hardingham), the girl who went missing over a decade prior. Alice’s sudden return causes ripples of suspicion through the small community, especially when it is revealed she may hold vital clues to the whereabouts of another missing girl, Sophie Giroux, who vanished shortly before Alice. Haunted by the unsolved Giroux case, French detective Julien Baptiste (Tchéky Karyo) is motivated out of retirement to follow new information that Alice may have on Sophie’s disappearance. Told across three timelines, flitting between 2014 and the present day, we follow Alice’s family as they are thrown into a turmoil that threatens to tear them apart at the seams.