Mack (Elizabeth Lail) is a disillusioned 30-something who is exhausted by societal demands and wishes to be comfortable in her skin like her grandmother. While at her best friend's bachelorette party, she stumbles into a "sound bath regression pod" and emerges as a 70-year-old (Diane Keaton), "Aunt Rita," soon realizing that the acceptance she craves from those around her is unlikely to come as quickly.