Forensic doctor Kong Qiqi wakes up in ancient times with fragmented memories. She discovers that solving cases helps her recover them and embarks on a journey of investigation. Along the way, she meets Ninth Prince Mu Zhixi, who bears a striking resemblance to her ex-boyfriend. As they unravel hidden conspiracies, including the poisoning that weakened Mu Zhixi years ago, their connection deepens, leading them to uncover long-buried secrets together.