 Harry investigates a case of hit and run where the victim was a 16 year old boy from the nearby housing estate. Working with Sgt. Susan Fenn, they attempt learn if this was an accident or intentional. Harry takes quite a liking to Susan and is shocked by a sudden turn of event. Leo examines a death resulting from a house fire where the lady of the house died. He is puzzled at why she was unable to leave and the police immediately suspect the husband, who was in a nearby park with the children, of murder. Nikki looks into the case of a young woman who collapses at her hen night. She had recently had minor surgery and was taking pain killers, but there is surprising information to be found about her background.