Captured by a press gang, entangled in French espionage, betrayed and abandoned. Francisco Mouse's quiet life in eighteenth-century Hampstead Heath is thrown into upheaval when he leaves home to find his way in the world. As he travels through London, he is captured by a press gang along with the brawny, steadfast mouse Curmudgeon. Forced into the service of the British Navy aboard HMS Goliath, Francisco discovers treason amongst rats who control the lower deck and forms a plan to defeat the plot to destroy the British navy. In Gibraltar, Francisco faces the brilliant French spy, Jacques Tremblant. But things do not go according to plan. As Francisco suffers in captivity, the Goliath sails with Admiral Nelson's Vanguard to confront the French fleet at the Battle of the Nile. Victory or disaster hang in the balance! "Never judge one by size or apparent abilities. Those whom you least expect of greatness may make others around them great!"