In the small hospitality suite of a Wichita hotel, veteran salesmen and longtime friends Larry Mann (KEVIN SPACEY) and Phil Cooper (DANNY DEVITO) have arrived along with Bob Walker (PETER FACINELLI), a young and relatively new employee at Lodestar Laboratories, to pitch their industrial lubricant products to prospective buyers.
As the men prepare the suite for the upcoming reception, their differences immediately become apparent. While Bob appears naïve but eager, Phil seems worn out with the business and the life of being a salesmen. Larry, on the other hand, is eager to make his pitch to their biggest potential client, dubbed "The Big Kahuna," but is otherwise a sardonic man with no qualms about speaking his mind or belittling others with his acerbic wit and comments.
As a result, the conflicting personalities and behavior of the three men soon comes to a head as the evening wears on and Larry realizes that Bob has strong religious convictions and isn't above discussing them with others. When their efforts of landing the Big Kahuna seemingly fail, the tensions rise and the differences between the men soon leads to some unpredictable revelations and behavior.