Though he had previously appeared in David Bradley's film adaptation of Julius Caesar, Dark City marked Charlton Heston's first role in a major Hollywood production. Danny (Heston) and his pals Augie (Jack Webb), Soldier (Henry Morgan), and Barney (Ed Begley Sr.) set up a poker game to take Arthur Winant (Don DeFore) for all his money, but after the fact they discover that the money he lost wasn't really his and, in desperation, Arthur killed himself. Arthur's brother Sidney (Mike Mazurki), a large man not known for his emotional stability, becomes enraged when he learns the facts about Arthur's death, and he vows to kill the men responsible. When his friends start dropping like flies, Danny hides out with his girlfriend, nightclub singer Fran Garland (Lizabeth Scott), and pays a visit to Arthur's widow Victoria (Viveca Lindfors) in hopes of finding out who the killer might be. Jack Webb and Henry Morgan later reformed after their first appearance together as criminals when they co-starred in the TV show Dragnet.
by Mark Deming synopsis