Sheng, a young man haunted by gaps in his own past, finds himself drawn back to the town where he grew up, hoping to piece together forgotten chapters of his life. There he encounters Yiyao, and a spark of connection ignites between them that culminates in a heartfelt confession at the Summer Festival. Yet this moment of joy unravels when Yiyao awakens the following day with no recollection of him whatsoever—leaving Sheng to grapple with a deepening mystery: has something genuinely stolen her memories, or is his own fractured mind leading him astray?