It is the first thaw of spring and the body of a young woman surfaces in the River Thorne in the far north of Sweden. Rebecka Martinsson is working as a prosecutor in nearby Karuna. Her sleep has been disturbed by haunting visions of a shadowy, accusing figure. Could the body belong to the ghost in her dreams? And where is the dead girl's boyfriend? Joining forces once again with Police Inspectors Anna-Maria Mella, Rebecka is drawn into an investigation that centres on old rumours of a German supply plane that mysteriously disappeared in 1943.