Maria is the new teacher who arrives at an old religious school. On her first day, she will have to teach a group of rebellious teens who are part of a punishment class. An unexpected event will turn the classroom into a real hell.

The young Sira lost her parents in a mysterious fire in her house when she was only 10 years old. Now 21 years old, she has been welcomed by Dana and Alfred, her new adoptive parents. To celebrate the arrival of the young girl to her new home, they give her a mirror that they bought at a flea market; Sira realizes that the mirror is the same one, with which her mother performed strange rituals. From that moment, very strange events begin to occur and Sira changes.