A Zero Month crossover issue. Jeremy Mason leaves the Tellus Institute for a day at an outdoor concert festival. While there, Jeremy meets a tattooed man, who knows more than he should about the origins of the world of Arkana. Arkana is a dimension created by the collective unconscious, populated by the Nameless One and his children. His children, the Archai, are all crafted by the thoughts and dreams of humanity; some, like the Storyteller, date back to the Najaho Indians, while others, like Lost Johnny, come from American culture. Over the history of Arkana, there are those that side with the Nameless One, like his eldest daughter Mania, and those that fight against him, such as the Warrior and the Animus. Because the dreams of the unconscious can seep into our world, the Nameless One can influence us, and his sigil is prevalent in our world. However, the nameless one gave birth to the Syzygy, a unity of male and female, that can defeat him. Syzygy imprisoned the Nameless One in ice, but the Nameless One prepared the way for one to free him: a combination of Animus and Anima. Jeremy takes this knowledge, confused of his role in the fight.
- "DC Universe 20" one page Zero Hour advertisement featuring the front page of the Daily Planet with the headline "Zero Hour for Earth?"
- "DC Universe 21" a one page memorial dedicated to Neal Pozner. Artwork of three headshots of Neal by Phil Jimenez.