From the depths of a fractured timeline, a vengeful force known as Monarch emerges, determined to get his revenge by targeting Captain Atom. Hank Hall, the man behind the Monarch armor, crosses over into the main DC timeline seeking revenge for the death of his wife, Dove, in a reality where Captain Atom had been responsible. Monarch's actions send shockwaves across the universe, sparking a conflict that unites heroes from various corners of existence. As Captain Atom forms an Extreme Justice to confront Monarch.
