The world is infested with monsters - the kind that fly, breathe fire and eat people. As humanity struggles to stay on the top of the food chain, journeyman-for-hire Will is paid to escort a ragtag band of misfits, including a few scientists who he doubts will make it through another night, across a treacherous wasteland full of orcs, magic creatures, and worst of all, other humans, in search of something that could save the world - or destroy it.