Sakaido is a genius detective who can track down any criminal. But when his daughter is murdered, revenge lands him on the other side of the law. Now in prison, he helps the police solve mysteries using a system that invades a person’s identity. Little by little, a trail of blood forms, and it all leads back to his daughter’s murderer.

Haruto Tokishima, a high school student, discovers Valvrave, a mysterious and very powerful machine, and after controlling it Haruto becomes immortal.