Johan is a cold and calculating killer with a mysterious past, and brilliant Dr. Kenzo Tenma is the only one who can stop him! Conspiracy and serial murder open the door to a compelling, intricately woven plot in this masterpiece manga thriller.

Suspecting that Johan suffers from a multi-personality disorder, Dr. Tenma calls upon expert criminal psychologist Rudy Gillen to help him in his campaign to stop Johan. But will Dr. Gillen come to the same conclusion as the authorities - that Tenma is the killer with the split personality?