Aunt Mary and her two nephews, Ferdinand and Paul, leave the ruins of Angkor for the capital of Cambodia, Phnom Penh. They experience a pleasant (?) journey on the native bullock carts, and spend five days aboard “sampans,” the native boats, to reach that destination. At Phnom Penh the royal dancing girls perform for them. Later they visit the zoo, but Aunt Mary is so “fussy” that Ferdinand takes it into his head to “bolt” the party. His aunt is panic-stricken and hires Mr. I. Fearnothing, the famous detective, to find him. They take up the trail, but are interrupted in the search by a great procession, the annual fete of parading Buddha about the city. They meet a personage of dark skin, supposedly of royal birth, who gives them a clew. The royal personage’s clews get the party into many embarrassing and humiliating predicaments. At the end of a week Ferdinand is still missing, and Aunt Mary gets word to return at once. She boards a steamer. The royal one follows. At sea she still bemoans the loss of her nephew, when he of the royal dress greets her, wipes the black from his face and proves to be Ferdinand.