Younger conta a história de Liza (Sutton Foster) uma mãe solteira que de repente se encontra de volta no mercado de trabalho, mas sua idade se tornará um fator de dificuldade. Porém, as coisas mudam quando ela conhece Maggie (Debi Mazar), que acha que ela aparenta ser muito mais jovem do que realmente é. Ela acaba trabalhando como assistente e faz amizade com colegas na casa dos 20 anos, como Kelsey (Hilary Duff).
Based on the novel by Pamela Redmond Satran, “Younger” follows 40-year old Liza, a suddenly single mother who tries to get back into the working world, only to find it’s nearly impossible to start at the bottom at her age. When a chance encounter with a young guy at a bar convinces her she looks younger than she is, Liza tries to pass herself off as 26 – with the help of a makeover, courtesy of her best friend Maggie. Armed with new confidence, she lands a job as an assistant to the temperamental Diana and teams up with her new co-worker and twentysomething Kelsey to make it in the career of her dreams. Now she just has to make sure no one finds out the secret only she and Maggie share.