Losing your soul is easier than it seems...Alexis has everything she needs to be happy: an amazing boyfriend, the perfect best friend and her beloved little sister Casey. The girl is very glad that after all the trials she found friends and is trying to become part of the family again. But lately Casey’s behavior has changed a lot: she is constantly silent, attends some closed meetings and always carries a small mirror with her. Has her sister once again found herself in the grip of otherworldly forces? Having begun the investigation, Alexis learns that the girls have bound themselves by an oath to a spirit who is ready to give success to everyone who is faithful to him. At first, everything seems like a harmless child's game, until Alexis begins to realize that Casey's friends worship an ancient book, the influence of which is growing every day. The girl intends to destroy the evil contained between the lines of the tome. But even fire is not able to break the contract that bound the girls’ souls. And now they have to pay too high a price...