Anyway, this has nothing to do with Conversion. Make me shut up.
Colleen Rowley is under a lot of stress. She's about to graduate from St. Joan's high school, and she's applying to several top-level universities, and she wants to be valedictorian--meaning she's in tenth-of-a-point competition with a classmate--and her amazing history teacher has the gall to get sick, leaving an objectionable sub to manage the class. On the day that Mr. Mitchell doesn't show up, some of the high schoolers start acting strange. Clara, the most popular and well-liked girl in the school, has what appears to be a seizure in the middle of class. Her two best friends shortly follow her to the hospital, exhibiting even stranger symptoms. As panic and rumors spread, more girls fall ill. Parents, students, the school, experts, and the health department all get involved in trying to uncover the cause of the Danvers Mystery Illness. Colleen, who's been reading The Crucible for her history sub, makes a discovery that none of the officials nor experts have come close to. Could there be supernatural elements to the sickness?
Meanwhile, in 1706, a young woman named Ann Putnam tells her local reverend a strange story--when she was a teenager, she and some of her friends started the Salem witch trials. And the girls were all lying.