Only one man can save the Queen. In Andalusia, Lieutenant St Vincent Halfhyde is sent by the unpredictable Captain Watkiss on a secret mission ashore: to aid the Queen's Messenger who is being pursued by nefarious Spanish agents. But when Halfhyde discovers a plot to kill Queen Victoria, herself, the stakes are raised. Now he and the rest of his flotilla must face down the Spanish Navy and get the messenger back to Britain with vital information. While the Spanish charge their guns, the British government warns Captain Watkiss to use civilized diplomacy instead of naval might. It's a tangled web of Victorian intrigue, but one thing becomes increasingly clear-it's up to Halfhyde to save his Queen at any cost.