set 4 months after 1x8. eleven is still gone, thought to be dead, and mike has a hard time coming to the realization that eleven may very well be dead. but is eleven dead? maybe she is, maybe she isn't. odd things start happening again, starting with will byers. (lmao i'm sorry i cant make descriptions for shit but read if you want???)

3 years have past by and everyone has moved on from the freak incident in 1983. Everyone except Mike. Mike made a promise, promises don't get broke. But will he get his promise back?