Plot summary
Eleven and the others determine that the Mind Flayer is coming for her, since she was the one who previously closed the gate and thus its only threat. Will senses the Mind Flayer approaching. The Mind Flayer attacks the group, and though Eleven defends the others, the Mind Flayer manages to injure her before they flee. Dustin and Erica hide a drugged Steve and Robin in the Starcourt movie theater. Eleven's group breaks into a supermarket to help treat her wounds and gather more supplies. Dustin contacts them over a walkie-talkie to try to explain the situation before he loses battery power.
Eleven uses her powers to find Dustin, and the group take off for the mall. Steve admits that he has feelings for Robin, but she comes out to him as a lesbian. Hopper's group make their way to the fairgrounds in Hawkins to find the children, where they are spotted by Kline, who alerts the Russians. Grigori fatally shoots Alexei in front of Murray. Murray, Hopper, and Joyce evade several Soviet agents and learn the agents are looking for the children at the mall. Eleven's group arrives at the mall in time to stop the Russians from shooting Dustin's group. Exhausted and in pain, Eleven collapses, her wound pulsing.
Credits
Adapted from Wikipedia contributors, Stranger Things season 3. HTML formatting and reference markers removed.