As the most hidden "time manager" in the infinite world, Shen Si just wanted to live quietly, until he ran into his ex-boyfriend Lu Chen, who had broken up five years ago, in an unsolvable time loop copy. The opponent stood in the face of the pure newcomer, but always turned into a BOSS at the end of the cycle and died in front of him. Shen Si was forced to tear off his salted fish disguise, hold the authority of reincarnation, and embark on a journey to save (and hunt down) his predecessor. However, he gradually discovered that Lu Chen's soul fragments were scattered throughout various high-risk dungeons, and every death hid an unspoken truth. When the ultimate mystery is revealed: does saving your lover mean betraying the order of the entire real world? Standing at the end of time, Shen Si must make the last choice to reunite his "broken mirror".