The setting is a city block during a sweltering summer, where the residents serve as representatives of the not-very-idealized American melting pot. There is idle chitchat, gossip, jealousy, racism, adultery, and suddenly but not unexpectedly, a murder.

Sylvia Sidney
as Rose Maurrant

William Collier Jr.
as Sam Kaplan

Estelle Taylor
as Mrs. Anna Maurrant

Beulah Bondi
as Emma Jones

David Landau
as Mr. Frank Maurrant

Matt McHugh
as Vincent Jones

Russell Hopton
as Steve Sankey

Greta Granstedt
as Mae Jones

Eleanor Wesselhoeft
as Marguerite 'Greta' Fiorentino

John Qualen
as Karl Olsen (as John M. Qualen)