What should be done if the only copy of a will capable of disinheriting the rightful claimant has vanished without a trace into the sea depths? The eccentric millionaire Mison finds an answer: he orders the text of his last will to be tattooed on the back of a young fellow traveler. Upon returning to England, the girl and her accidental companion are drawn into a maelstrom of intrigue, greed, and scandals, where a fast-spinning adventure and English humor are intertwined with reflections on the limits of human ingenuity and the price of wealth.