Choi Don-hak

A man who poured his life savings into a new apartment discovers its walls are full of disturbing noises, hostile neighbors and unsettling secrets.

Having lost his colleague who was also his brother-in-law to a serial murderer two years ago, homicide detective Jae Hwan is unable to contain his hatred toward the murderer and dives headfirst into hunting the brutal killer. Jae Hwan finally comes face to face with the murderer Jin Hyuk but in the heat of the chase, they get into an accident. Waking up in a hospital, Jae Hwan realizes his body has been switched with that of the murderer. To protect his family and uncover the secret of this body switch, Jae Hwan begins a desperate chase.

Blind acupuncturist Kyeong-su is able to see like a normal person at night. One evening, Kyeong-su witnesses the death of the crown prince. King Injo is driven into madness while Kyeong-su attempts to reveal the truth behind the prince's death.