A group of high school students create a vigilante group to expose the crimes of corrupt adults but soon find themselves in the midst of a worldwide conspiracy and targeted by powerful individuals who would do anything to silence them.
A boy robbed of his future must fight to clear his name. With help from a mysterious cat and like-minded outcast teenagers and the cerebral world of Mementos connecting everyone's subconscious, this boy will take on the mantle of Joker and start the vigilante movement of a lifetime: The Phantom Thieves.—Johnny