Struggling actress Samantha (Elisabeth Moss) is given an opportunity to get a free trial at Shell, a pioneering health and beauty company that promises to keep its clients looking young forever. Samantha’s life and career are transformed by the treatment, and she develops a burgeoning friendship with Shell’s CEO, the ultra-glamorous Zoe Shannon (Kate Hudson).
But when a string of former Shell patients go missing under mysterious circumstances, including popular social media star Chloe Benson (Kaia Gerber), Samantha starts to fear she may be in danger herself.