Five days after Owen Zastava Pitt pushed his insufferable boss out of a 14th story window, he woke up in the hospital with a scarred face, an unbelievable memory, and a job offer. It turns out that monsters are real. All the things from myth, legend, and B-movies are out there, waiting in the shadows. Some of them are evil, and some are just hungry. Monster Hunter International is the premier eradication company in the business. And now Owen is their newest recruit.

When marine private Oliver Chadwick Gardenier is killed in the marine barrack bombing in Beirut, somebody who might be Saint Peter gives him a choice: Go to heaven, which, while nice, might be a little boring, or return to earth. The Boss has a mission for him, and he's to look for a sign. He's a marine: He'll choose the mission. Unfortunately, the sign he's to look for is "57". Which, given the food services contract in Bethesda Hospital, creates some difficulty. Eventually it appears that God's will is for Chad to join a group called Monster Hunters International.

Jake Sullivan is a licensed private eye with a seriously hardboiled attitude. He also possesses raw magical talent and the ability to make objects in his vicinity light as a feather or as heavy as depleted uranium, all with a magical thought. It's no wonder the G-men turn to Jake when they need someoneto go after a suspected killer who has been knocking off banks in a magic-enhanced crime spree.

Since time immemorial the Spires have sheltered humanity, towering for miles over the mist-shrouded surface of the world. Within their halls aristocratic houses have ruled for generations, developing scientific marvels, fostering trade alliances, and building fleets of airships to keep the peace. Captain Grimm commands the merchant ship Predator. Fiercely loyal to Spire Albion, he has taken their side in the cold war with Spire Aurora, disrupting the enemy's shipping lines by attacking their cargo vessels.

After the War of the Gods, the demons were cast out and fell to the world. Mankind was nearly eradicated by the seemingly unstoppable beasts until the gods sent the great hero, Ramrowan, to save them. He united the tribes, gave them magic, and drove the demons into the sea. Ever since, the land has belonged to man, and the oceans have remained an uncrossable hell, leaving the continent of Lok isolated.