Stone's (Tom Selleck) therapist (William Devane) notices that Stone drinks less when he is working a case. Since things are slow, he suggests Stone work on a cold case. So he decides to do so, working a case from a bank robbery a few years before in which a teller was taken hostage, and murdered. One of the officers, Rose (Kathy Baker) was there when the body was first discovered, and remembers vomiting. Stone digs up the same place, but digs deeper and finds some clothes.
These serets him on a new investigation. The mother identified the body, but then had a stroke a few days later. Dental records or finger prints were not used in the identification. Stone visits the family, and discovers the mother had a stroke and is non verbal. The sister reports she was in California when it happened and returned home to care for her mother.
Bit by bit, Stone pieces together the evidence. The only hitch is that the mob at the bank, where they were wondering money, wants there money back and begin to go after Stone in an effort to get it; a mobster whose brother was previously killed by police has a vendetta for Stone. Stone discovers what happened, the bank robber was shot in the escape, and was actually the teller's sister. When she dies of her wounds, the teller switches clothes and the teller is presumed dead not the sister. However Stone sees no benefit to pursuing this. The money has gone for care of the mother and if the sister is arrested, no one would be available to care for the mother.
One last attempt by the brother of the mobster end poorly for him.
