Lin Guonan, a retired agent who looks cool and restrained but is actually ruthless, disguises his identity to marry into the wealthy Zhong family in order to investigate the truth behind his sister's mysterious death. On his wedding night, he discovered that the groom Zhong Guomo also had a secret - this seemingly gentle heir to the group was actually inextricably linked to the serial murders he was investigating. The two test each other and confront each other in the mansion, and each confrontation reveals a deeper layer of secrets. As the investigation deepened, Lin Guonan discovered that a huge underground organization was involved behind his sister's death, and Zhong Guomo was both a prey and a hunter. When the truth gradually emerged, two men who also wore masks were forced to join forces. In the baptism of blood and fire, they went from mutual hostility to mutual trust, and finally unveiled a shocking conspiracy that lasted for ten years.
