Thousands of years ago, the human race won a war with the demon clan, and the demon clan was forced to sign a protection treaty:
1. Every demon must protect a contractor, and must be absolutely loyal to the protected person without any feelings.
2. Children born from the union of humans and demons will be cursed, and the children will live forever and be unable to condense the inner elixir.
3. Only the inner elixir of the monster father (mother) can save the child.
4. Monsters that lose their inner elixir will be wiped out in three days.
5. The guardian must absolutely obey the three mark orders of the contractor until one of them dies.
6. Monsters are not allowed to leave the monster world without authorization.
There are also distinctions between people in this world. Some people are born with spiritual power. These people live in the human world, while those without spiritual power are in the lower world. These people can return to the human world by cultivating spiritual power the day after tomorrow. However, these people generally have a lower status and are most likely to become slave commodities. If they make mistakes, they will be thrown to the lower world. There is only one seemingly solid boundary between the lower realm and the ghost realm. For people in the next generation, even if they become slave commodities in the human world, it will be thousands of times better than living in fear in the lower world.
The heroine and her twin brother are a mixed race of human and demon. In order to save their lives, the heroine's mother divided her inner elixir into two parts and barely saved them both. However, she left them soon because she had no inner elixir.
The heroine and her brother have been in the assassination organization almost since they were born. They were able to carry out tasks alone at the age of ten without missing a beat. They were killing and learning to kill before the age of 16. At the age of 16, they were taken back by their father and started a new life: "boring" "study" (the heroine and his brother had already learned this). The year she turned eighteen was special because the heroine met Lan Yi, Lu Ling, Lan Cheng, etc., And the six of them completed the mission together. Helping each other in mission after mission makes her world more "human". She also gains something and loses something in mission after mission and grows.
The story begins with two little princes coming to the heroine's sect to train. The heroine naturally hates these pampered people. With the order given to her by her father (the head of the heroine's sect), the heroine starts a fierce competition with the two little princes.
The heroine originally thought that there would be no other intersections, but God did not follow her wishes, and these two little princes became two of her six-person team. According to the sect's regulations, disciples in the sect can voluntarily form a team, with a maximum of six people. Her team originally had only three members, namely captain Shangguan Ting (herself), team members including Shangguan Qi (her younger brother) and Shangguan Yu (senior sister). Now there are Lan Yi and Lan Cheng, the twin princes, although they look nothing alike. According to them, one of them looks like their father and the other looks like their mother.
Main CP: A cold-blooded young lady who thinks she is evil VS a cold-blooded young prince who thinks she is cool
Deputy CP: The Playful Prince VS the Arrogant Senior Sister
Mission: Unconditional trust