Jim Simpson rides into an area known locally as "The Valley of Badmen" to claim his father's ranch and learns from the county attorney, Mr. Horton, that it had been sold to pay back taxes. Simpson smells a rat, since his father had never had difficulty paying the taxes before. Simpson starts to snoop around with the help of a pretty cowgirl and his sidekick Half Pint and learns that the Horton and McQueen, another rancher have conspired to steal his ranch.