Following the devastating death of his wife in a fight against evil, Gabriel is convinced to reunite with his old group of demon hunters. This journey takes him from a quiet life in America to the mysterious depths of Europe. Accompanying him is his long-lost best friend Michael, who is hiding a sinister secret, along with the enigmatic Hannah, whose prophetic visions reveal the future, and a diverse group of demon slayers. As Gabriel faces the loss of some team members, he must grapple with his sorrowful history and determine who is truly an ally or an adversary.