Chen Mo and Lin Xiao deeply loved each other. After an accident, the two woke up to find their identities swapped, forced to continue living in each other's shoes while making constant mistakes from work to daily life. But when Lin Xiao suddenly disappeared, Chen Mo found that the memories regarding the switch began to crack, and familiar scenes and confessions kept recurring. He finally realized that what trapped him might not be the misplacement of identities, but a past he could never let go of.