She Acts, I Diagnose

True daughter Qin Nuan is framed by the fake daughter Qin Rou and sent to a psychiatric hospital for half a year. After discharge, she appears obedient on the surface but uses her 'mental patient' identity to exact revenge on those who harmed her, including beating up provocateurs and designing traps for Qin Rou and others to suffer the consequences. Qin Nuan seems insane but is actually intelligent and obsessive, knowing how to use 'self-defense' and sleepwalking as disguises to protect herself. Her family goes from favoring Qin Rou to gradually recognizing the truth and feeling guilty, while Qin Nuan always walks the razor's edge between madness and sanity, reclaiming everything that belongs to her through extreme means.