After being arrested and having to transfer to a new high school in Tokyo, Akira Kurusu is given the goal of rehabilitation and awakened to a new power--the power of one's true self, a Persona. Using his Persona and the mysterious navigation app Mementos, Akira and his friends take on the role of Phantom Thieves, saving people from the twisted desires of those around them.

The Phantom Thieves' next target is none other than the prosecutor investigating their case--and Makoto's big sister--Sae Njima! In order to clear their names, they have no choice but to accept Akechi's help in changing Sae's heart. But they face one of their trickiest palaces yet--a casino built around cheating!