“Telephone technician Mal Granger, with knowledge of telephones and electronics, is hired by gangster Vince Walters to expand Walters’ legitimate business that is a front for an illegal bookmaking operation. The expansion is a great success, and Granger also develops a better system for gathering information at racetracks. Granger wants a cut of the action and threatens to leave unless Walters makes him a 20% partner. Walters accedes to the demand.

When Walters tries to collect from a bookie, the bookie kills first Walters, then himself. Granger takes control of the wire service and the racket, making him a target for Lieutenant Wright of the Los Angeles police.

East Coast mobster Larry Mason is sent by boss Carl Stephans to persuade Granger to join his syndicate. Granger and Mason’s wife Gail are attracted to each other……..”

And so on.