When Julie Dalton, a pretty, young English teacher in Berry Township, a Northeast suburban area, is found murdered in the school's field house, Kado Dolan, a 60 year-old retired teacher is asked to teach the victim's classes. The victim has left a clue on the dusty blackboard in her classroom. As a result many possible killers emerge: a fellow teacher, a former student, and angry cheerleader, a pressured student, a jealous sister, and a high school beau. George Clews, the Berry Police Chief and a former student of Kado's, holds a press conference and announces that Julie had sustained multiple stab wounds. Once he learns that Kado will be teaching Julie's classes, he asks her to keep her eyes and ears open for any information that will help solve her friend's murder. One night while preparing her lesson plans, Kado gets a weird idea and calls George. Together they unravel the extraordinary clues that bring the killer to justice.