One day while riding the bus, Sakurakouji Sakura looks out the window to see people being burned alive with a blue fire as a child his age remains unharmed and standing over the people. When he went back there the next day, no bodies or evidence of any kind of murder, just a small fire. When Sakura goes to class, he found a new transfer student is the same boy she saw the day before. Sakura soon learns that he is Rei Ogami, the sixth "Code: Breaker," a special type of assassin with a strange ability and a member of a secret organization that serves the government.