Two girls exchanged their lives. A killer queen was once dragged down by her pig teammates and was blasted by a grenade to become a bride in another world. This bride is a reborn person. The cause of death in her previous life was because she discovered that her husband was having an affair with another man and was poisoned to death. Later, she was reborn until she got married at the age of 16, and then exchanged bodies with the heroine. Before the Killer Queen joined the killer organization, she lived a new and warm life that she had never enjoyed before. And the heroine lived a salty life in another world, teasing the fake husband and his lover, becoming the queen, and kidnapping a eunuch to be her husband.