Sang Jiu accidentally transmigrates into a novel and wakes up as a patient in a psychiatric hospital. To conceal the fact that she is sane, she decides to play along and continue acting crazy in everyone's eyes. Unexpectedly, she encounters Chu Wenye, the second young master of the Chu family, who is also pretending to be insane to protect himself. The two, each harboring secrets, accidentally become husband and wife. From testing each other and remaining on guard to facing trouble side by side time and again.