Edward Nygma, alias The Riddler, learns that his friend the Calendar Man has been murdered.
The Riddler vows to stop Calendar Man's killer, and all signs point to the Caped Crusader himself.
The Riddler's investigation uncovers a conspiracy that forces him to form an unexpected alliance.
After piecing together The Messenger's trail of corpses and clues in the sewers of Gotham City, The Riddler crashes a fundraising gala and runs into an important person from his painful past.
To save the life of a friend, Edward Nygma must reflect on his own early life and the circumstances that led him to become The Riddler.
After a slight detour, The Riddler finds himself in grave danger at the Heed Estate.
The Riddler and Batman risk everything to end The Messenger's apocalyptic crusade.
The Riddler discovers a secret that calls everything he thought he knew into question.