Port Mafia leader Mori Ougai orders a 15-year-old Dazai to investigate rumors of the previous boss returning from the dead.
Dazai meets Chuuya Nakahara, the powerful leader of a juvenile group called the "Sheep". Despite their mutual dislike, they form a reluctant partnership to uncover the truth behind a mysterious explosion and a god-like entity known as Arahabaki. Bungou Stray Dogs 3rd Season (Dub)
After returning to the present day, the story shifts to a confrontation with a new threat: the "Rats in the House of the Dead," led by the mastermind Fyodor Dostoevsky. Port Mafia leader Mori Ougai orders a 15-year-old