Lionel Whitney is an accountant fascinated by the noir detective novels of fictional PI Mark Savage. During the events leading up to his wedding, Lionel crosses paths with E.L. "Tenspeed" Turner, a smooth-talking fast-thinking con artist. When Tenspeed needs a job to make parole, Lionel fulfills his life's ambition, start a detective agency, and hires Tenspeed as his partner. Now the two men take on whatever cases come their way.
Fast talking conman EL Early Leroy "Tenspeed" Turner hooks up with straight arrow suburban professional Lionel Whitney (who just happens to have a black-belt in Karate and was an Olympic Games pistol shooting competitor) to form a mismatched buddy private detective team.
As Nazis and mobsters pursue Lionel for the diamonds E.L. planted on him, the accountant convinces the ex-convict to come up with a scam that'll get the criminals arrested.
Lionel takes on his first case, tracking down a missing girl on behalf of a millionaire. But he soon discovers that the millionaire wants her dead, and others start dropping dead round her.
Lionel falls in love with a female client, who has hired him to find who is trying to kill her. Meanwhile, E.L. tries to duck a former partner from his past.
A stockbroker and friend of Lionel's hires the detectives to investigate two men who are having him make investments with negotiable bonds.
E.L. is smitten with Lola Marshall, a beautiful dancer who hires the partners to find her missing brother, a computer programmer who was used in a scheme to liquidate a tax evader's company against his will.
E.L. gets his old partner, Mike McGill, to run a scam to pay Lionel with con money to keep the agency afloat. However, the fake crime that they set up uncovers a real one, and the crooks will do anything to keep it quiet.
A lounge singer comes to the partners for help against a crazed gangster.
E.L. is busy running a real estate scam on an Arab sheik when his nephew B.L. arrives in town. The boy has stolen a numbers runner' book and has convinced the crook that E.L. has it.
E.L.'s tough new parole officer wants to put him away, and the partners go after someone who wants to kill the officer to convince him otherwise.
When Lionel investigates the 40-year-old murder of a woman, people start shooting at the partners.
The agency's cleaning woman is Russian royalty and a desperate Russian professor wants her so he can obtain a jeweled dagger from her.
A judge hires the agency to do a background check on a criminal feigning insanity, but the partners soon discover that she's not what she seems.
The partners try to impress Lionel's parents and get involved with diamond thieves.
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