From IMDB:

When a young boy disappears, his mother, a police chief, and his friends must confront terrifying forces in order to get him back.

Holy Middle School Nerds!

If my neighbors had not recommended the eight episodes of Season One of this sci-fi creeper, I would not have entered the “Upside Down World”. Unfortunately, once inside this semi-adult fantasy it is obsessively difficult to escape. So instead I binged-watched all the horror, high school romance, middle school bullying, and hysterics this TV series (streamable from Netflix) had to offer. To tell you the truth, it was a lot of fun and possibly a waste of time.

Winona Ryder we all know.  David Harbour has many roles to his name, including David Patrick from “State of Affairs” and Elliot Hirsch from “The Newsroom”.  Most of the cast were very young and did quite well. Indeed it seems to me that the middle school gang of four nerds got their literally hysterical parts just right.

If the plot grabs you, you will never escape. Supposedly there is a Season Two.