The Big Caper is a 1957 film noir movie based on the 1955 pulp novel of the same name by Lionel White. It was directed by Robert Stevens and stars Rory Calhoun, Mary Costa and James Gregory
As a means to do this, Frank buys a local gas station and garage, and he and Kayposing as a married couplemove into a house nearby. In the following month, Flood recruits a team of specialists, including veteran safecracker Dutch Paulmeyer. By now, Kay is enjoying her masquerade role as homemaker and tells Frank that she will be breaking off her relationship with Flood. Frank refuses to compromise his friendship with Flood by pursuing Kay, although he is attracted to her. Kay suggests buying a second gas station, and going straight and abandoning the criminal life.Frank eventually agrees to consider a romance with Kay, but only after the heist has been successful. In the following months, Frank and Kay establish a friendly relationship with the Loxleys, of which husband Sam is a banker. The plan is to set off diversionary explosions at the opposite end of town, which will occupy the police and fire departmentsand likely much of the townon the night of the planned breakin. However, Flood has hired Zimmer, an explosives expertwho is also an alcoholic and a psychotic pyrophiliacto engineer the explosions. When Zimmer shows up in San Felipe, he moves in with Frank and Kay. ........
Source: Wikipedia