The heroine Xu Zhi is a calm and self-possessed female prison guard. Her life is completely disrupted when she receives a wedding invitation and a rusty key. The person who sent the things was her former love and now the upstart technology star Shen Sijuan.
An accident many years ago completely changed Xu Zhi's life. She went from being a proud girl to an ordinary person who had to struggle for a living. She eventually chose to become a prison guard who worked with criminals as punishment and escape from the past. And the initiator of all this was Shen Sijuan.
Shen Sijuan re-entered Xu Zhi's life with a strong attitude that could not be refused. He paranoidly believed that all the choices he made back then were to protect her, and tried to use money and power to make up for everything and "lock" her back to him. His love is strong, crazy, yet suffocatingly controlling.
Xu Zhi struggled and resisted in the love web woven by Shen Sijuan. She used her professional characteristics and extraordinary observation skills to secretly investigate the truth of the accident. As the investigation deepened, she discovered that the events of that year were far more complicated than she imagined, involving the grudges of the two families and a deeper conspiracy.
In the extreme pull of falling in love and killing each other, both of them were forced to uncover their bloody scars and face each other's paranoia and fragility. When the final truth surfaced, pointing to a person he
