New girl Rachel Chavez is eager to make a fresh start at Manchester Prep. But as one of the few scholarship kids, Rachel struggles to fit in, and when she gets caught up in a prank gone awry, she ends up with more enemies than friends.
To her surprise, however, the prank attracts the attention of the Mary Shelley Club, a secret club of students with one objective: come up with the scariest prank to orchestrate real fear. But as the pranks escalate, the competition turns cutthroat and takes on a life of its own.
When the tables are turned and someone targets the club itself, Rachel must track down the real-life monster in their midst . . . even if it means finally confronting the dark secrets from her past.