There is a legend that if the ravens at the Tower of London ever leave then Britain will fall, so when somebody steals the birds, the Queen calls for Mac B. to find the thief and retrieve them--a mission that takes him to Iceland, where he encounters secret submarines, hungry polar bears, and his arch-nemesis from the KGB.

While on a mission aboard the The Emperor of the Seas, Ben Ripley faces off against his arch enemy, Murray Hill, on the high seas and quickly finds himself in hot water as things take a dangerous turn.