Agnes Callan's past is a mystery and she will do anything for it to remain that way. Trained to be a silent assassin in the underworld, she is the best in the elite members of the House. But the death of a comrade drives her to the surface. The quest is dangerous for someone who has never seen the city of light under the rule of its new king. Agnes is found and threatened by her kidnapper who dares to question her strength. But the girl knows he wants something that she only can get. So, woven in a web of lies, she accepts a lethal bargain. But soon, the girl finds out that the people of her past never forget and will again try to eliminate her. While her true self loaths for light, she will be kissed by the deception of the royal family and pulled in a race against time as her own people try to break her. As she battles her way through, she will eventually have to make a choice between the oath she has made long ago or the vengeance of her past.