In this thrilling sequel to The Nor'Wester, Duncan Scott returns to England from Canada to search for his long-lost sister, Libby. Arriving on the Liverpool docks, Duncan learns that his sister's fate has captivated the entire country. He also learns a name: Elizabeth Fry, a prison reformer who helped Libby and who holds the key to her location. But before he can meet Fry and find his sister once and for all, Duncan is kidnapped by a Press Gang in a dockside inn. Forced to take the "King's Shilling," Duncan must serve in the Royal Navy where he once again becomes an unwilling player in the game of Empire. Now on board His Majesty's Ship Cerberus, Duncan meets old friends and makes dangerous enemies. Before Duncan's service ends, he will face deadly cannon fire on the Baltic, and will go on to fight an epic battle with Napoleon's fleet in the Mediterranean Sea, a battle that could very well seal his own destiny, that of his sister Libby, and of the British Empire itself.

This gripping novel for young readers begins in 1805, when fifteen-year-old Duncan Scott and his sister Libby lose their parents in a Glasgow cotton mill fire. Their tragedy is compounded when, through one reckless act of grief, the Scott children become fugitives as well as orphans, and must flee Scotland. Across the border in England, Duncan and Libby are betrayed by their travelling companion. In a desperate attempt to save Duncan from the gallows, Libby sacrifices her freedom for her brother's - a selfless act of courage on the Liverpool docks that sends her to prison and propels Duncan over the storm-swept waters of the Atlantic to Canada. After a year in Montreal, Duncan is enlisted to travel by canoe across the continent to New Caledonia, carrying secret orders for the trader, Simon Fraser. Before he can go home and find Libby, Duncan must join Fraser on a dangerous voyage of discovery to the sea, a journey down what Fraser assumes is the Columbia River but which turns out to be what later will be called the Fraser. Along the way, Duncan faces death, danger and treason, and must somehow find the courage to save his companions, the expedition, and himself.