Before Sam and Dean, there was John and Mary. Told from the perspective of narrator Dean Winchester, this is the epic, untold love story of how John met Mary, and how they put it all on the line to not only save their love, but the entire world.

Set in an alternate America where witches ended their persecution over 300 years ago by cutting a deal with the government to fight for their country, the series follows three young women from basic training in combat magic into early deployment.