Steve Martin stars as U.S. Army Master Sergeant Ernest G. Bilko, a conniving motor pool supervisor who uses his position to finance various get-rich-quick schemes, including illegal gambling, at a Kansas military base. His commanding officer, Colonel Hall (Dan Aykroyd) is mostly oblivious to Bilko's antics. Trouble arrives when the master sergeant's old rival, Major Thorn (Phil Hartman), appears. It seems that Thorn, the butt of several past Bilko capers, is eager to settle the score by spearheading a review of Bilko's records and stealing away his fiancée Rita (Glenne Headley), who may have been left at the altar one too many times. At the same time, military engineer Major Ebersole (Austin Pendleton) is testing a new high-tech "hover tank" that may not be quite ready for deployment.