Detective Bun was recognised as a talented criminal profiler until he sliced off his right ear to offer as a gift at farewell party of his chief. Branded as mad and discharged from the force, he has lived in seclusion with his beloved wife May ever since. Strangely, Bun has the ability to see inner personality of a person, their subconscious desires, emotions, and mental state. When a missing police gun is linked to several heists and murders, hotshot Inspector Ho calls on the valuable skills of his former mentor Bun to help unlock the identity of the killer. However, Buns unorthodox methods point to a fellow detective and take a schizophrenic turn for the worse.