Hannah can always spot a killer. Until she looks in the mirror.

Hannah Herbst is Germany's most experienced facial resonance expert. She can successfully 'read' a suspect through a tiny twitch of the lip or the flicker of a pupil. As a consultant to the police, she has already helped convict a number of violent criminals.

Struggling with the effects of memory loss after an operation, Hannah is confronted with the most terrible case of her career: a woman has confessed on video to brutally murdering every member of her family, except for her young son.

When the woman manages to escape from prison, the fear is she will go after the rest of her family... Only Hannah can tell if the video actually holds the truth.

There is just one problem: the woman in the video is Hannah herself.

'A true master of his craft' Chris Carter

'One of the crime world's most evocative storytellers' Karin Slaughter