As a young and newly qualified detective, Superintendent Signe Brask is put on the case of 10-year-old Mille who has disappeared without a trace during a family trip.

Despite a vigorous search, the girl is never found. Ten years later, a young woman shows up in Copenhagen claiming to be Mille. The family welcomes her home, but where has she been for 10 years? When Signe goes to close the case, she makes some unexpected discoveries. And that’s exactly when the family is hit by a new tragedy....