Longarm's seeing double… The Olsen sisters are as beautiful as they are deadly. Hilda and Pearl were twin mistresses to Senator Taft Baker of Sacramento, California, but now the polygamous politician has been shot to death in his bed-and the sisters are nowhere to be found. Word is, they've fled to Denver, where it's up to Deputy U.S. Marshal Custis Long to bring the diabolical duo to justice-on the double! While the sisters may be identical in appearance, they turn out to be as different as night and day when it comes to temperament. Evil twin Pearl aims to blast Longarm with both barrels, while Hilda is more interested in doubling his pleasure. This time the lawman will have to think twice before making his move-or the Olsen twins may just be the death of him…