After seeing a tragic romance movie with her parents, Supergirl becomes determined to find a mate for Superman, determining that his romances with Lois Lane and Lana Lang aren't going anywhere. First, she goes to ancient Troy and arranges for Superman to meet her there. She tries to set him up with Helen of Troy, but fails when her own super-powers steal the show and all of Helen's admirers prefer Supergirl. There, Supergirl explains her plan. Superman reveals that if he were to marry someone, it would be Supergirl, except that in Kryptonian culture, the marriage of cousins is unlawful.