Millie Bobby Brown), Mike Wheeler (Finn Wolfhard), Dustin Henderson (Gaten Matarazzo), Lucas Sinclair (Caleb McLaughlin) and Will Byers (Noah Schnapp) face an all-new set of challenges — without each other. “Struggling with the aftermath, our group of friends are separated for the first time and navigating the complexities of high school hasn't made things any easier,” the official series description reads.