The series is based on a series of works by Charles Soul and Will Sliney. It tells the chilling stories of people who are secret agents. Each character is forced to fight in a supernatural cold war on the side of the Hidden College, a bankrupt organization on the brink of destruction. For example, spouses Maya and Sebastian Stone made a deal with the organization. Now they have to pay their debts. The mission of the couple is to find 666 cursed coins.