Monsters bleed into our world through an open wound in the fabric of reality, and we've lost our only means to draw out and destroy them.

But if others can travel to our world, why can't we go to theirs?

To fight the Infected, the Guardians needed the ability to draw them out, to take them on in circumstances of their own choosing. That tactic ended with the destruction of the Mana'thiandriel, enchanted artifacts used to gather the Infected, in a battle which not only convinced the world the problem was real, but also sealed the fate of humankind.

With limited resources, and plagued by heartbreak and loss, the defenders of Earth need a new plan. Scan thinks there may be a way out-he believes he can trace the magic of the alien interplanetary travel, and return the Guardians to the origin of their one-way trip. "Return the Guardians, get more Mana'thiandriel, save the Earth... easy peasy."

If only it were that simple.

Can the ragtag gang, thrown together by happenstance, overcome their pasts, navigate a web of deceit, and find a means to save the Earth?