In 2029, thirteen unearthly structures called Doorways appeared across the world. Any human that entered immediately disappeared. Thousands were never seen again, but every once in a while, someone would come back out after a few days, garbed in strange clothing and possessing superhuman powers. Despite the odds, many of the desperate, ambitious, and hopeful surged through the Doorways in search of personal power.
Eleven years have passed, and the world has undergone catastrophic changes as the result of superhuman conflict. Entire continents and civilizations have been lost, a supervillain epidemic threatens those societies that remain, and the world's greatest superhero team has just been destroyed. In the wake of this latest tragedy, a band of powerful superhuman bounty hunters comes together to track down the source of these disasters, and perhaps save what remains of the falling world.