A rumour of Shin Ha-ru's forged brain donation consent form puts the prominent neuroscientist in a pickle.

When a famous guitarist dies on stage during a live performance, the team take on the case as their first assignment.

When the body of a female victim is found with burns on her face and hands, her husband, who suffers from prosopagnosia, becomes the prime suspect.

With new evidence and a new suspect, Ha-ru and the team members close in on the culprit with the help of a brainwave test.

Myung-se interrogates a six-year-old girl whose mother believes she killed her father because she is possessed by a wicked spirit.

Ha-ru sneaks out of the building and vows to reveal the real spirit. Ha-ru discovers a suspicious video clip of Myung-se on his tablet.