Adventure novelist Darya Krasilina is going to Altai accompanied by an FSB officer, a friend of her former husband. She wants to write a series of essays about the life of local Old Believers. But even such a dependable companion can’t prevent dangerous misadventures—Krasilina is captured by militants from a mysterious and powerful organization that turns people into zombies. And although the brave writer miraculously manages to escape, her life is still hanging by a thread for a long time—until a team of special forces comes to Dar’ya’s aid, led by her former husband, Vetrov…