Mystery surrounds the death of Queen Victoria's grandson England, 1892.

Victoria, Queen and Empress, is in the 54th year of her reign, when her grandson Prince Eddy, eldest son of the Prince of Wales, is found slaughtered in his bed at Sandringham. Terrified of more royal scandal, the Prince of Wales and his spin doctors decide to cover up the facts and the murder is disguised as death by influenza.

Lord Francis Powerscourt, an Irish investigator, is privately asked to find the killer. His quest takes him on a journey through the prince's debauched and dissolute past, across Europe to the misty waterways of Venice where, amidst scandal and suicide, Powerscourt finally unravels the mystery of the sweet prince's last goodnight.