Synopsis

A persistent haunting plagues a man; exorcisms have proven futile, so they turn to Kogorou to unravel the mystery. The only clue is a card bearing a chilling message: the fifth ghost will claim them unless they atone for their sins. Since the card arrived, the master has installed a secure door on the upper floor, requiring both a numerical code and biometric verification for entry. The master, his wife, and the door's installer are close friends, bound by a shared secret of transgression.