Following several bank robberies, Gordon and Bullock investigate the Red Hood gang. Selina Kyle continues to bond with Barbara, and Fish Mooney tries to reclaim her position in the underworld.

Mad Hatter sets his eyes on his next victims, forcing Jim Gordon to make some tough decisions. Meanwhile, Penguin and Nygma's relationship evolves, and a familiar face comes back into Nygma's life.

With the deadly virus spreading throughout the city, the search for the antidote continues, as Fish Mooney, The Riddler and Penguin reveal plans of their own. Bruce meets Ra's al Ghul and completes his last task in order to fulfill his destiny, but realizes he can't let go of his past. Meanwhile, Gordon tries to win back Lee, and past alliances within Gotham City are broken, while new alliances are formed.

Professor Pyg continues to torment Gotham city, involving Jim Gordon whenever possible. Sofia and Penguin get ready for a fundraiser for the orphanage, and things don't go as planned when Professor Pyg shows up as the chef. Meanwhile, Bruce's partying gets in the way of his relationship with Alfred.

Jeremiah warns a skeptical Gordon of more destruction coming Gotham's way, and Gordon is forced to make a potentially devastating decision. Meanwhile, Barbara rallies together a team to secure her position, as alliances in the underworld shift and prove no one can be trusted. Then, Bruce is forced to come to terms with the future.

Gordon and Penguin are forced to work together and alliances are shaken when Lucius, Nygma and Barbara all have different ideas of the culprit behind recent events at Haven. Selina continues her quest for revenge against Jeremiah.