Lin Shixia has multiple personality disorder, with three personalities coexisting within her: her primary personality, a scholarly personality, and a green tea personality. One day, a fourth personality, the Doomsday Personality, suddenly awakens and warns that Huo Yanchuan's space-time experiment will destroy the world. The four personalities join forces to escape from the psychiatric hospital, adopting the alias Green Lin Shixia and infiltrating the Huo Group under the guise of an antique clock restorer. Her skills catch Huo Yanchuan's attention, and the two become bound together by an unexpected space-time incident, forcing them to work together. Following space-time anchors, they investigate across multiple locations while contending with Lu Mingzhe's forces. As clues emerge, Lin Shixia begins to suspect that Huo Yanchuan is the mastermind, yet her feelings start to waver as they face life and death together. When the truth is finally revealed, Huo Yanchuan has crossed through time and space for one reason alone: to save her from the sacrifice she made in the first timeline.