In the year 20XX, the fabric of space and time folded in on itself, bringing prehistoric creatures and parts of their world into the present. While these were initially easy to contain, the creatures brought with them ancient diseases that mankind was unprepared for. The prehistoric viruses and bacteria whittled away at mankind until only small pockets of civilization remained. Those who live outside the safety of settlement walls are considered eccentric. But those who need help have no choice but to turn to them for help...