Mr. Moto is in Egypt to thwart a criminal mastermind determined to steal the priceless crown of the Queen of Sheba. When the precious treasure is transported to America, Mr. Moto must race against time to unmask the cunning thief who will stop at nothing—not even murder—to get what he wants.
Chin-Ching gets lost in Shanghai and is befriended by American playboy Tommy Randall. She falls asleep in his car which winds up on a ship headed for America. Susan Parker, also on the ship, marries Randall to give Chin-Ching a family.
Several days after one of his company's dams burst, ruining the life savings of several investors, a shady power company president is found stabbed to death. Ellery Queen gets to the bottom of the mystery.
