Xie Bi'an, the best employee of the year in the underworld, was forced to take over a mess due to a rare seduction mistake: the girl Su Yayang kept dying within seven days before her life was over, causing yin and yang disorder. In order to correct her mistakes and save her performance appraisal, this golden medalist had to remain in the state of a living soul and fall into an infinite loop of the seven days before her death.
Disguised as a psychiatrist, he has to face suspects with secrets during the day and use his underworld authority to solve mysterious cases; at night, he has to deal with his immediate boss who always sends weird rules at critical moments, as well as bugs that pop up in the underworld system from time to time. In repeated despair, he found that what he wanted to save was not only Su Ya's life, but also her heart that was gradually becoming cold in the cycle.
And hidden behind all the deaths is a shocking conspiracy that spans the two realms of Yin and Yang. Xie Bi'an must find the truth before the countdown reaches zero - not only for the KPI of the underworld, but also to give the bright eyes in desperate situations a dawn to survive.
