On Christmas Eve, 15 years ago, someone murdered an entire family. 12-year-old Minako was the only survivor. However, she loses her memory from the shock. Immediately after the murder, the person who discovers the bodies, Minako’s sister’s boyfriend, is arrested for the murders.
On Christmas Eve 15 years later, Minako is full of happiness as she is engaged to her lover, Kiichiro. Yet, she is still concerned with the fuzzy memories that appear in her mind time and again. One day, Minako finds a letter she received right after the murders, and goes to the ‘Sleeping Forest’ in her hometown to meet the letter’s writer. Awaiting Minako is Naoki, a mysterious man who knows everything about her. From this point on, Minako begins to find the truth about her past, her buried memories, and the incident. This romantic mystery depicts the encounter and parting of people drawn together by fate.