One of three daughters separated after the death of their parents in a wagon accident, Purity was rescued and raised by a bachelor rancher who treated her as the son he never had. Always convinced that her sisters survived the accident that took her parents, Purity believes all three will some day find their way together. Meanwhile, she's got her hands full trying to save a failing ranch and protect the fragile health of Dan Corrigan, the man who has been a father to her. Dan's fall from a horse a few years earlier has left him in a wheelchair.
Purity gets no help from the bank.
Indeed, the bank president's son Roger is a twisted villain obsessed with possessing Purity. His desire for her is such that he denies the financial help that will ensure the success of the ranch. With no other place to turn, Dan calls in a favor from an old friend. When Jack and Cass Thomas arrive at the Circle C ranch, Purity instantly recognizes Cass as Pale Wolf, the Indian brave who held a knife to her throat months earlier. When the Indian was shot by one of the ranch hands, Purity made sure he lived.