They call it a boost. It's the buzz you get from absorbing the spiritual-energy of the dead, and it absolutely terrifies Lidia Powell. Shortly after meeting Ander at summer camp, Lidia is thrust into the world of psychic-mediums and brought to a new school. At Mountain Heights Academy, even a casual pizza-date is accompanied by a ghost, and only a frightened uberdork would refuse the boost. To Lidia, the peer pressure to absorb phantom-apparitions is horrifying, but to everyone else, it's the drug of choice. However, when one of the students delves into dark energy, Lidia suspects that a boost isn't as innocent as it seems. Soon, the boost becomes an addiction and Lidia must act fast before the changes become irreversible.