In 1983, there was an unknown government agency in the small town of Hawkins, Indiana. It seemed harmless, but the wire fence and tight security surrounding the building led people to suspect that some magical secret experiments were going on here.

After a little boy named Will Byers mysteriously disappears one night, his best friends Mike, Dustin and Lucas make a pact to find him.On the second night after Will disappeared, Mike and his friends met “Eleven”, a girl who seemed mentally abnormal and almost silent. They knew that the girl and the disappearance of her friends must be inextricably linked.The boys hid Eleven and decided to solve the mystery on their own.