chunk: In May 1805, during the Napoleonic Wars, Captain Jack Aubrey of HMS Surprise is ordered to pursue the French privateer Acheron, and "Sink, Burn or take her [as] a Prize." The British warship is ambushed by Acheron; Surprise is heavily damaged, while its own cannon fire does not penetrate the enemy ship's hull. Using smaller boats, the crew of Surprise tow the ship into a fog bank and evade pursuit. Meanwhile, Aubrey learns from a crewman who saw Acheron being built that it is heavier and faster than Surprise, and the senior officers consider the ship out of their class. Aubrey notes that such a ship could tip the balance of power in Napoleon's favour if allowed to plunder the British whaling fleet at will. He orders pursuit of Acheron, rather than returning to port for repairs. Acheron again ambushes Surprise, but Aubrey slips away in the night by using a clever decoy buoy and ships lamps.