In 21 Again, five mums aged 35-45 undergo an age-defying make-under to roll back the years, before attempting to seamlessly slot back into 20s life without being discovered. Armed with a new look, a new wardrobe and a crash course in Gen Z culture, the mums live in a brand new city with their daughters, who will challenge them to experience the highs, the lows and the daily struggles they face today. What does it mean to be 21 today and will walking a mile in their daughters' shoes ultimately bring these mums closer to their kids?