(Audio: Japanese, Subtitles English) Widower Takumi lives a quiet life with his six-year-old son Yuji after the loss of his wife Mio. On Mio's first death anniversary, Takumi and Yuji come across a woman seeking shelter from a monsoon downpour. She bears an uncanny resemblance to Mio, but has no recollection of who she is. Family life resumes from where it left off. However, their new life together is interrupted by the discovery of Mio's diary, which reveals the secrets of her past.