For three years, seventeen-year-old Cas Lowood has carried on his father's work of dispatching the murderous dead, traveling with his kitchen-witch mother and their spirit-sniffing cat, but everything changes when he meets Anna, a girl unlike any ghost he has faced before.

Months after Anna Korlov opened a door to Hell and sacrificed herself for seventeen-year-old ghost hunter Cas Lowood, persistent visions of Anna being tortured cause Cas to decide to save her as she once saved him.

Fifteen-year-old Ben must cope alone when a mysterious sniper begins shooting the big cats in his family's private zoological preserve.