Ren Amamiya transfers to Shuujin High School after finishing his first year of high school. The previously normal student develops a new power at the start of the year that enables him to enter people's subconscious minds and affect them. Within a short period of time, he meets new pals who share the same talent. The group of students creates the Phantom Thieves of Hearts organization to purge people of their corruptions. The high school pupils stick to their plan despite the recent mayhem caused by wandering spirits in Tokyo. Will they be able to purge their fellow humans, though...?