Qin Shuyi receives a death threat on the bathroom mirror. After narrowly escaping the danger of the red umbrella, she is hit with another warning—she will die if she fails to get home before ten o’clock.A series of suspicious actions by her supervisor Zhou Yanshen arouse her doubts. Before long, stalking and murder attempts follow one after another. When the truth finally comes out, it turns out Zhou Yanshen has an obsessive twin brother named Zhou Yueyang, who has repeatedly disguised himself as Yanshen out of jealousy to commit crimes.In the end, Zhou Yanshen is injured while saving Qin Shuyi. Zhou Yueyang is arrested, the misunderstanding between Qin Shuyi and Zhou Yanshen is resolved, and the two finally become a couple.