S1.E1 ∙ Prologue

It's a new Gotham. Tim Drake is dead. Harvey Dent is cured. The Joker is curiously content in Arkham. Batman has exiled himself from Bruce Wayne. The Riddler and Scarecrow have formed an alliance that threatens to unearth the darkest of secrets forcing the Dark Knight to enlist The Question to answer the steepest of questions. What is the last riddle?

Every city in distress needs a hero who is willing to sacrifice everything for the sake of peace and justice. Unfortunately, Chicago has Wayne.

After suffering his greatest loss, Batman leaves Gotham after the darkest night of his life. The city falls deeper into turmoil as corruption and anarchy spread like wildfire. Upon his return, the hero Gotham needs is not the one they want and from the shadows, the callous Joker recruits his agents to bring down the city once and for all.

With the help of Interpol Agent Makoto Arai, the newly-powered Gorou Watari/Sanagiman/Inazuman continues his adventures, this time against the nazi-like Desper Army led by Fuehrer Geisel.

Five characters who "should not be in this world" have appeared before Emu. These characters are Kamen Riders who have either died or disappeared. The mystery behind their revival is linked both to someone manipulating strings behind the scenes and the "ultimate superhero team" Kamen Sentai Gorider.