Danger intensifies and mysteries deepen in Greendale, Sabrina finds it increasingly difficult to keep her own secrets. And while the whole town is on edge from the most recent "monster" attack, Sabrina has tracked the source of the disturbances back to her high school. It may be up to Sabrina to save her new town by solving this one her own...but when the secrets she uncovers hit too close to home she'll have to make some very tough choices.