Underworld attorney Leo Barnes hires Gus Monk to safeguard a valuable envelope containing information on a mobster. Monk refuses — until he meets Mrs. Barnes and jumps on a merry-go-round of viciousness and murder.

George Maharis
as Gus Monk

Janet Leigh
as Janice Barnes

Rick Jason
as Wideman

Carl Betz
as Danny Gouzenko

Jack Albertson
as Tinker

Raymond St. Jacques
as Lieutenant Edward Heritage

William Smithers
as Leo Barnes

Jack Soo
as Hip Guy

Edward G. Robinson Jr.
as Trapp

George Burrafato
as Stanger