The body of the owner of a large trading company, Thornton Line, was found in London's Hyde Park with a bullet in the chest. Someone carefully placed a bouquet of yellow daffodils on the corpse’s crossed arms. A note with four Chinese characters "Tzu Chao Fan Nao" - "He owes this to himself" - was found in the dead man's pocket. The main suspect in the case is the Line cashier Odetta Ryder - a sweet, smart, gray-eyed girl with a wonderful figure and amazing grace. Shortly before his death, Line accused Odette, who rejected his feelings, of stealing money from the company's cash register. However, detective Jack Tarling does not believe in Odette’s guilt and finds in the murdered man’s past the story of another girl - a Chinese dancer with the stage name Little Narcissus!