Batman. The last knight on earth

Bruce Wayne comes himself in the psychiatric hospital Arkham. He absolutely does not remember how he ended up in this place, and most importantly - he does not suspect that the world was destroyed outside, and almost all superheroes died ...

In order to find answers to the questions tormenting him and find out the truth about what happened, Batman will have to make a long journey through the ruins of the destroyed civilization. The company will be a very unusual fellow traveler-the Joker’s talkative head in a glass jar, and the changed friends and enemies will meet the way from the miracle-woman to Lyus Lutor, who has lost the hope of Luther, idolizing Superman. However, the main mystery that the dark knight should unravel - what kind of dark evil arose in his hometown? Who is this mysterious person nicknamed Omega, who rules in Gotham with an iron hand?

And how is everything that is happening with one old case about a dead boy in a criminal lane?