Despite losing his childhood memories, Kidnagan can still become a very influential esper.
A catastrophe earned him the nickname 'Demon Boy' until he was sold as a slave to a bandit.
With his powers that are very different from other 'superhuman', he searches for the truth behind memory loss.
In a world full of chaos, he finds a girl with unique powers that other superhuman do not have. Will that power lead him to the truth?