Lyla Cunningham moves back to Hawkins while in her fourth semester of college and instantly regrets it. She was excited to spend more time with her little sister, Chrissy, only to discover she's become a whole new person since Lyla moved away. Of course, her relationship with her parents is still anything but good. After some time, Lyla starts to realize that the new Chrissy isn't okay and begins to worry about her well-being. At the same time, Lyla's high school best friend, Eddie Munson reappears in her life. The last time they spoke, a few months before Lyla graduated was... intense. Despite this, Eddie agrees to put it all aside to help Lyla find out what's wrong with her sister. When things don't go as planned, Eddie suddenly becomes the only suspect in a murder that all of Hawkins is talking about. And who gets tangled beyond repair into the whole mess other than Lyla, herself? Will the two of them make it out alive, together? Or is it all just wishful thinking?