Two-Gun Betty.

Ranch owner Jack Kennedy is in need of some cowhands. Young Betty Craig, a friend of Jack's sister Florence, bets her that she can disguise herself as a man and get a job at the ranch, fooling all the cowboys As "Bob Craig", she gets hired, but although Jack and the cowboys aren't fooled by her "disguise", they decide to have some fun with "Bob" and put her through a series of practical jokes to test "Bob's" mettle. However, things don't turn out quite the way the boys expected--and Betty has an even bigger surprise in store for them.