Is it possible to uncover the truth where silence is safest? A shocking crime takes place in a children's psychiatric hospital: one of the patients is found with her throat cut. The hospital authorities, keen to avoid a media scandal, are pushing for the case to be closed quickly. Suspicion falls on the girl who shared a room with the victim. The suspect claims she remembers nothing of the tragic night, and when she regained consciousness, she was holding a bloodstained knife. The staff, the investigators and the public immediately pass judgement, deciding that the teenager's mental health problems are proof of her guilt. Detective Jakub Sobieski must delve deep into the hospital's dark recesses to uncover the truth hidden behind its walls. In this claustrophobic setting, every word may be a lie and every step a trap.