The trilogy follows the exploits of Sophie Mercer, a young witch, who is sent to Hecate Hall ("Hex Hall"), a boarding school for Prodigium juvenile delinquents. An awkward, sarcastic girl, she becomes best friends with her vampire roommate, Jenna Talbot, who is an outcast like her.[3] Sophie also gets swept up in a love triangle involving Archer, the school's resident bad boy, and Cal, her betrothed. Through a series of events, Sophie gets caught up in the secret war going on between the Prodigium and a group of humans who believe the Prodigium should be destroyed.[4] As the trilogy progresses, Sophie discovers more about herself, powers, and the mystery behind her family's origins.[5]