The book starts with the girl who is the main protagonist entering a new town during a storm. Upon entering the town she has an accident (caused by her book having a reaction with an unknown force when entering town lines) where she meets the boy with the curse (that she doesn't know about at the time). Later, both the boy and girl find out they go to the same school and start to talk and get to know each other. The girl meets another girl with white hair, whose life force has been tampered with.
The boy's girlfriend is found out to be a witch that placed a curse on his family that allows her to stay young if there is someone alive from that family but they slowly go insane the older they get. There's something about binding a non-magical person to a witch and that what the girl and the girl with the white hair end up trying to do but it fails. It ends up working with the boy with the curse. There's also something about it now working for males that are conceived of a man or something like that. Which doesn't aply to the boy because he was a in vitro fertilization baby.