On the eve of her 19th birthday, Mizuki is grappling with a recent family tragedy, a cheating boyfriend, and a betrayal by her best friend. In despair, she flees to a dilapidated estate where she encounters Adam, a mysterious figure playing a familiar melody. Drawn to him and the house, Mizuki uncovers a haunting connection. As the full moon approaches, her boyfriend and a few schoolchildren work to unravel the dark secret from 19 years ago and save Mizuki.
