In a future world where monsters and humans are at odds, scientific researcher Su Li accidentally discovers that he can form a blood contract to awaken the power of the monster clan. When she established a master contract with the arrogant demon king Cang Yan, she was involved in the throne succession war. As more monsters join the contract network, the twin royal marks awaken in Su Li's body, and the tragic memories of the first king and the girl of the key gradually emerge. When the Purifier Organization and the human plutocrats join forces to launch an extermination plan, Su Li must balance the seven demon energies, awaken the Twin Thrones with Cang Yan, and rewrite the fate of the human and demon races.
Concept: In a cruel world of racial antagonism and power struggle, a forbidden love that spans between humans and demons