"The Summoning" is a fantasy novel by Kelley Armstrong, part of the Women of the Otherworld series. It follows the story of Chloe Saunders, a teenage girl who discovers she has the ability to see ghosts. After a traumatic experience, she is sent to a group home for troubled teens, where she learns more about her powers and the supernatural world around her. As Chloe navigates her new reality, she encounters other gifted individuals, including Derek and Simon, who help her understand her abilities. Together, they uncover dark secrets about the facility and the true nature of their powers, leading to thrilling adventures and challenges.