Musical stage star Mona Leslie (Jean Harlow), jailed for reckless driving, is bailed out by her friend, sports promoter and gambler Ned Riley (William Powell), to headline a charity event. However, she finds that all the seats have been bought by wealthy Bob Harrison Jr. (Franchot Tone), president and only member of S.A.M.L. (the Society for the Admiration of Mona Leslie). Mona begins dating Bob, with Ned's approval. Mona's Granny (May Robson) tells Ned that her granddaughter would break it off if he asked her to. Ned is reluctant at first, but eventually buys a wedding ring. However, he is too late.