Felix Carver carries the ghosts of magicians in his blood. He can communicate with them and use the magical abilities they wielded against monsters when they were alive. This newfound power would be pretty cool, if the ghosts in question weren't his family and the man who killed them.
An organization of magicians called the Bright Guardians take Felix in, hoping they can train him to fight monsters and control the ghosts he's bound. Felix barely understands the magical world his family kept secret from him, but he does make friends with other odd cases at the Bright Academy. Arisa Tamura struggles with her ability to animate objects while under the influence of a curse, while Mason Briggs is a witch who was transformed into a demon as a last resort to save his life.
Together, the three of them realize that enemies are hiding among the Guardians. They have no idea who they can trust, but they do know who they can't: Ernest Abernathy, who stole a powerful wand from Mason's parents. Felix, Mason, and Arisa must construct a plan to steal back the wand without help. If their plan fails, Ernest could turn the Guardians against them. If they succeed, they'll have one more weapon in the fight against a looming enemy.