An American police procedural chronicling the work of a fictional version of the Baltimore Police Department's Homicide Unit.

A minor car accident drives two rival aluminum-siding salesmen to the ridiculous extremes of man versus man in 1963 Baltimore.

Set in 1959, Diner shows how five young men resist their adulthood and seek refuge in their beloved Diner. The mundane, childish, and titillating details of their lives are shared. But the golden moments pass, and the men shoulder their responsibilities, leaving the Diner behind.