"Guet-apens," said Mary, "I feel ambushed!"

A young woman in trouble attempts to flee the guilt of her sin by enticing her sister to also be promiscuous and then connives to trap a soldier to claim fatherhood for the unborn child, naming her lover as the father would serve him a harsh punishment by the statutes of the fort.

A twist of fate for the young woman will secure her goal to hide the embarrassment of her sin. Her fate lay in the hands of a half-breed Indian, an unexpected prisoner at the fort.