She learned to ride from her mother. She learned to shoot from her father.

Billie Jo Dobbs was born to a Cheyenne mother and a US Marshal father. After an attack claiming her mother's life, she moves to Kansas with her father to start over. Years later in 1876, her father is ambushed at their homestead. With his dying breath he warns Billie Jo, saving her life.

Billie Jo flees to Rainbow Peak, Kansas on her Indian pony Bittersweet, looking for a few friendly faces. She convinces Judge Fuller Newton and his hired hand Digger to join up and ride with her to the Cheyenne territory in Montana to find her former tribe.

Along the way, facing trials and tribulations, Billie Jo discovers her Cheyenne family may be different than she remembered.