Joan Ludlow elopes with her wealthy neighbor Martin Grey in order to escape from her stern grandparents' home. Martin marries Joan mainly to protect her, and Joan behaves childishly. She adopts the slogan, "Who Cares?" and mixes in fast society, sometimes not seeing her husband for days. Joan is wooed by Gilbert Palgrave, the husband of her best friend Alice. Martin turns to Toodles, a chorus girl, for affection, even though he still loves his wife. One day Joan discovers Toodles in Martin's arms. When Palgrave later threatens Joan with a gun because she rejects his advances, Martin rescues her, and Joan and Martin find happiness together at last.