Lilly investigates a 1983 murder in which a young mother was killed by a homemade bomb packed in a laundry-detergent box shortly before she was to testify in court against a man who exposed himself to her.

Lilly reopens a 1990 homicide, in which a church organist was found stabbed to death in his van surrounded by pornography and drugs in a seedy part of town, after the man's Alzheimer's-afflicted widow begins to have flashbacks about the night of the crime.