Winter 1793 - Master and Commander Charles Hayden's orders are to return to the ill-fated frigate, HMS Themis. Placed in temporary command, he is to join the escort for the last convoy of the season - braving the wintry seas. Hayden's uncanny knack for attracting the attention of the French navy sees the Themis thrown back into action only hours out of port. Soon, Hayden's captaincy and military skill are stretched to their utmost as he finds himself at the vanguard of this brutal clash of empires.