In 1796 Ireland, the Mulvanes are oppressed by British laws and taxes. Daughter Mary seeks to rescue the family's impounded cow with the aid of beau, Michael Connor. Connor is killed. Mary's sentenced to be transported for 7 years.
Mary now a convicted criminal, boards the convict ship 'Britania' for the arduous voyage to Sydney. On board she meets Polly, the boss of the female prisoners and Greville, sinister officer of the NSW Corp
Time passes in the colony. Jonathon begins to have genuine feelings for Mary, thinking of the future he learns to read and write. Greville expands his empire and is prepared to eliminate anyone how gets in his way