Persona 2: Innocent Sin

Innocent Sin begins with Tatsuya and Lisa being lured by Eikichi to where his band is rehearsing in an effort to get Tatsuya to join his band. During the ensuing argument, their Personas reveal themselves and Philemon contacts them, warning them that rumors are becoming reality in Sumaru. The group then act out a game where a figure called the Joker is summoned to grant a wish. When Eikichi and his band do this, the Joker is summoned, then drains all the players but Lisa of their "Ideal Energy" (the essence of hopes and dreams) using a crystal skull .

The Joker then attacks Tatsuya, Lisa and Eikichi, accusing them of some unspecified "sin", but leaves when they cannot remember that sin. As the group attempt to learn the Joker's identity, they are joined by Maya and Yukino, the latter of whom is able to explain their Persona abilities. They are eventually brought into conflict with the executives of the Masked Circle, a cult led by the Joker who are gathering Ideal Energy using assigned crystal skulls. They are King Leo (Tatsuya Sudou), a deranged man whose eye was burnt out; Prince Taurus (Ginji Sasaki), a record producer who manipulates Lisa's budding girl group for his own ends; and Lady Scorpio (Anna Yoshizaka), a former student at Seven Sisters who is brainwashed by the group.

The group are gradually fulfilling the Oracle of Maia, recorded by Akinari Kashihara (Jun's father) under the influence of Nyarlathotep . After defeating Sasaki and Sudou, the group are contacted by Philemon, who directs them into caverns beneath the city's Alaya Shrine, where the group are gradually told about their "sin". Ten years prior, Tatsuya, Eikichi, Lisa, and Jun were part of a group named the Masked Circle, where many of them sought solace from their awkward home lives. After Maya announced that she needed to leave, Eikichi and Lisa locked her in the town's Alaya Shrine in an attempt to force her to stay.

In a tragic twist of fate, the deranged Tatsuya Sudou set fire to the shrine, and it was only Maya awakening to her Persona that saved her from death. Sudou attempted to kill Maya in his madness, and Tatsuya burnt out his eye with his own Persona. These events were so traumatic that everyone but Sudou willingly forgot them. Jun, manipulated by Nyarlathotep into believing Maya had died in the fire, took on the mantle of the Joker to punish his former friends and make people's wishes come true.

Confronting the Joker and the final member of the Circle, Jun's estranged mother Junko, they and the Circle are attacked by group of rumor-generated Nazis called the Last Battalion, led by a resurrected " Fuhrer ". Junko, realizing what she and Jun have done, dies protecting Jun from an attack by the Fuhrer using the Spear of Destiny. After battling him, Jun repents, causing his "Ideal Father" to remove his Persona ability and take control of the Masked Circle. Sumaru City is then raised into the sky as part of Xibalba, a spacecraft manifested through rumors surrounding Kashihara's writings, fulfilling part of the Masked Circle's plans.

After being rescued, Yukino grants Jun her Persona powers with Philemon's help. With the Masked Circle and the Last Battalion waging war with each other, the party decide to return the city to normal by removing the five elemental crystal skulls being fought over by the two factions, then confront the Ideal Father. As they collect the crystal skulls, all the party but Jun confront Shadow Selves, manifestations of their suppressed insecurities. On the way to collect the final skull from the heart of Xibalba, they are forced to stop Maya Okamura, a former colleague of Kashihara who has been driven insane by events, from fulfilling the Oracle.

Upon reaching the heart of Xibalba, they battle the Fuhrer and the Ideal Father, who turn out to be Nyarlathotep in disguise. After their fight, Philemon appears and explains their status as manifestations of humanity's opposing feelings, and that they have been competing over whether humans can find a higher purpose while holding contradictory feelings. Maya is then fatally wounded by Okamura using the Spear of Destiny, the Oracle is fulfilled, and all the world but Sumaru City is decimated. After Nyarlathotep and Okamura leave, Philemon tells the remaining group that they can reverse Nyarlathotep's work by willing the erasure of the day the five first met as children from existence: in exchange, they must give up their shared memories.

The group agree, and a new timeline is created where each character's life has been improved, though their friendship is forgotten. The final scene is of the former group inadvertently crossing paths in front of a train station, with Tatsuya bumping into Maya.