One day, An Nanxi wakes up to find that everything around her has changed. Her mind somehow holds the thoughts and memories of two people, and the two sets of memories gradually merge over time. Clever as she is, she realizes that she has encountered a parallel world. An accidental interview and investigation brings her into contact with a secret from the Xuan Dynasty. Following the clues with Gu Jiangyan, she uncovers a shocking secret from that era. As they investigate, they confess their feelings for each other and choose one another, wholeheartedly.
