In the happiest moments of Keisuke Niijima's life, he treasured every instant with his wife Takae. Their relationship began at work, grew into love, led to marriage, and eventually brought their daughter Mai into the world. After Takae's passing, time stood still for Keisuke, making it difficult for him to connect with Mai.
Ten years later, a change looms over the melancholic Niijima household when a young girl arrives at the door, claiming to be Takae's reincarnation. After verifying her assertion, Keisuke's perspective shifts, and he eagerly looks forward to creating new memories with his cherished family. Yet, this extraordinary turn of events harbors significant dangers, and one misstep could lead to devastating consequences for Keisuke and those close to him.