Dustin tries to escape Starcourt with the others, while Nancy and Eleven lead a fight against the Mind Flayer.
Will and his friends look for the Mind Flayer. Nancy and Hopper uncover new info about Starcourt.
Dustin tries to crack the Soviet code. Nancy and Jonathan find diseased rats. Eleven makes a relationship decision.
Hawkins, Indiana is experiencing strange things once more. And it's connected to the Soviet Union.