In the summer of 1985 in Hawkins, the newly opened Starcourt Mall has become the center of attention in town, causing other stores to close their business due to its popularity. Hopper disapproves of Eleven and Mike's relationship and is feeling separated with Eleven. Joyce considers moving out of Hawkins with her children. And she gets the help of Hopper to investigate the reason behind her magnet losing its magnetism. Will begins having premonitions regarding the Upside Down, despite Eleven having closed the portal, they realize the Mind Flayer is still alive. And it soon takes control of Max's stepbrother Billy Hargrove, leaving Eleven and her friends no choice but to battle him, the other possessed victims, and destroy the Mind Flayer in its new and terrifying form, once and for all.