El and Mike 20 years in the future

Just as the group of friends thought all of the drama was over, they find out that it was just the beginning. It's been 20 years and Mike wants to take that next step with El, will she be able to say yes? Meanwhile, Lucas is struggling with his break up with Max and never comes out the house anymore. Dustin on the other hand has a new girl in his life and Will is a single teacher working in the Hawkins school, everything seemed less stranger than usual until the group are aquatinted by some old familiar friends which pop up from another dimension. Will the team be able to stop the invasion?