During the final trial of the Hunter Academy, the mentor leads 32 students into the mysterious Night Ember Altar. Everyone sees a golden exit, except for F-class girl Ning Jin, who faces only a blank wall. As her classmates are reduced to ashes one by one, she and her friend also fall into a dead end. Faced with the fatal temptation of the ancient throne, Ning Jin sees through the contract's loopholes, turns the tables to make the throne suffer the consequences, seizes the Night Ember sovereignty, and awakens the power of insight. From a sacrificed prey to the dark queen, she will lead the knights to meet the Twelve Thrones Battle sixty days later, uncovering the shocking conspiracy hidden behind the sacrifice.