Jack, Stephen and Diana voyage back to England pursued by two privateers sent by Johnston, Diana's former lover and the man from whom Stephen stole secret documents. They evade capture, and Jack and Stephen are soon sent to the Baltic on a secret mission. Diana travels to Paris and lives with friends.Stephen lands on an island manned by Catalan troops serving under France. He convinces them to give the island over to the English in return for transportation home. On the way, Jack helps a British ship chase a French man-o-war. He gets caught in a storm and is shipwrecked. Jack and Stephen are thrown in prison. Johnston shows up and accuses Stephen of being a spy. In the nick of time, the two escape with the help of some French agents who are seeking to overthrow Napoleon. Stephen picks up Diana and the three head back to England. Stephen and Diana finally get married on the voyage.