STRANGER THINGS kicks off with the mysterious disappearance of young Will (Noah Schnapp), who vanishes in the woods while biking home from a Dungeons & Dragons session with his friends Mike (Finn Wolfhard), Dustin (Gaten Matarazzo), and Lucas (Caleb McLaughlin). The first season centers on getting him back from the terrifying, eerie Upside Down: a supernatural, monster-filled realm below the small town of Hawkins, Indiana. The characters include Will's terrified mother, Joyce (Winona Ryder), and his brother, Jonathan (Charlie Heaton), as well as bold Sheriff Hopper (David Harbour). There's also a mysterious girl known as Eleven (Millie Bobby Brown) who's escaped from a shadowy experimental facility that seems somehow connected to the Upside Down. As the show progresses, the friends learn more about the Upside Down and the threats it holds and must work with each other -- as well as with allies like fellow teens Max (Sadie Sink), Steve (Joe Keery), Nancy (Natalia Dyer), and Robin (Maya Hawke) -- to triumph over the darkness.