The narrative centers on a 16-year-old main character who relocates to Shujin High School in Tokyo. While living with his parents’ friends, he befriends two classmates: the rebellious Ryuuji Sakamoto and the introverted Anne Takamaki, along with Morgana, a talking, shape-shifting creature resembling a cat. As they navigate their stifling surroundings, the quartet bands together to create the “Phantom Thieves,” embarking on heists and experiencing enigmatic events throughout their journey.