Maggie Mullen is a fiercely independent 27-year-old woman who has built a quiet, simple life for herself that revolves around her cat-tending business, the time she spends each evening in her oversized claw-foot bathtub with her own faithful feline Lucy nearby, and her enduring love for Frank Sinatra. Her life becomes more complicated when she's asked to be maid of honor at her younger sister's late-summer wedding-a prospect that she dreads, especially having to give a toast at the reception. Maggie's strong opinions and many flights of fancy help her get through her ordeal.