In the ninth and final episode of the fourth season of Chapter Nine, we see the culmination of the season’s many plotlines.
As the episode begins, the characters of Hawkins are facing a new threat – a massive, shadowy creature called the Mind Flayer that seeks to destroy everything in its path. The Mind Flayer has taken over the body of a person known to the characters, making it even more dangerous.
Eleven and her friends devise a plan to …