Throne of Glass is about an infamous assassin named Celaena who was caught and enslaved in a mining camp for her crimes. At just 18 she is considered Adarlan’s greatest and most deadly assassin. She is taken to the king’s palace in Rifthold to enter into a competition to become the king’s champion if she can defeat the other 23 murderous competitors. If she wins then she will be required to do the king’s bidding for four years and then she is promised that her freedom will be restored.