Ellery Queen solves a mystery involving a valuable stamp.
Ellen McHugh, a poor Irish immigrant to America, finds work in a carnival and is thus able to send her son Brian to a fine school. But when her position is found out, the school expels Brian. Mrs. McHugh feels compelled to allow the school principal and his wife to adopt Brian. The widow McHugh becomes a housekeeper and raises her employer's daughter Edith, who grows up to fall in love with Brian McHugh.
Carmen, a gypsy, working in a Spanish cigar factory, is flaunted by Escamillo, the bullfighter, but infatuates José, a soldier, who aids her to escape from jail and follows her to the gypsy camp. Tiring of his love, Carmen finally fascinates Escamillo and the love-crazed José kills her at a bull fight just as Escamillo is being proclaimed by the audience.
