Bat returns to Casper, Wyoming to testify at a murder trial. He learns that all the other witnesses are either dead or are afraid to testify and the father of the man under arrest intends to eliminate the last witness

An eastern gambler playing a "system" breaks the bank at Bat's casino, putting the dapper Masterson out of business. Bat wonders if the "system" didn't have more than a little help from his pretty dealer.