Bat is hired to join a man in jail to gain his confidence and help him escape. The hope is the man will lead Bat to a string of black pearls he stole a train's express box. Bat's job is complicated when the man's sister shows up.

After Bat rescues an old gypsy from a brutal rancher, the old man offers him many valuable gifts, including a beautiful girl. When Bat learns she is not a gypsy but found near a wagon train massacred by Indians, he decides to take her.