The growing ambition of Julius Caesar is a source of major concern to his close friend Brutus. Cassius persuades him to participate in his plot to assassinate Caesar but both have sorely underestimated Mark Antony.

Based on the story of the start of Australia's colonisation. An American medical student is falsely convicted of robbery, with his sentence involving the torturous voyage with other prisoners to the new penal colony at Botany Bay. Because of his attempt to escape, evil Captain Gilbert decides to return him to England on charges of mutiny.