Lilly investigates a 1976 case involving a teenage girl who was beaten to death on a tennis court during a party at a plush estate.

The fiancé of a fireman asks Lilly to help prove that a convicted felon, about to be paroled on an unrelated crime, is responsible for the murder of the fireman's first wife. The young mother was killed by a homemade bomb shortly before she was to testify in court against a man who exposed himself to her.

Lilly re-investigates the case of a murdered church organist, when his Alzheimer's-stricken widow begins having flashbacks of the night in question.