Eric Kripke is an American screenwriter, director, and producer, best known as the creator of the popular TV series "Supernatural," "The Boys" and "Gen V."
The story tracks a group of young friends backpacking through Italy who come upon a travel guide called “The Book,” which promises unique off-the-beaten-path adventures. However, they get more than they bargained for when The Book leads them into the clutches of a demonic cult.