A small company dedicated to bringing happiness to the world receives a simple request to help a woman's unhappy son smile again, but the job turns out to be more complicated than it seems.
The series is set in 1980 Hawkins, Indiana where a young boy vanishes into thin air.
As friends, family and local police search for answers, they are drawn into an extraordinary mystery involving top-secret government experiments, terrifying supernatural forces and one very strange little girl.