After her former band shot to superstardom without her, Claire reluctantly agrees to a gig as a playgroup musician for wealthy infants on New York's Park Avenue. Claire is surprised to discover that she is smitten with her new employers, a welcoming clique of wellness addicts with impossibly shiny hair, who whirl from juice cleanse to overpriced miracle vitamins to spin class with limitless energy. There is perfect hostess Whitney who is on the brink of social-media stardom and just needs to find a way to keep her flawless life from falling apart. Caustically funny, recent stay-at-home mom Amara who is struggling to embrace her new identity. And old money, veteran mom Gwen who never misses an opportunity to dole out parenting advice. But as Claire grows closer to the stylish women who pay her bills, she uncovers secrets and betrayals that no amount of activated charcoal can fix.