Watch: 'Stranger Things' Season 3 final trailer.

Ahead of the release of 'Stranger Things' Season 3 on Netflix next month on July 4th, a final trailer has been shared for the upcoming new season, which bears the ominous message: "You let us in…and now...you are going to have to let us stay."

A synopsis for the new season reads: "It’s 1985 in Hawkins, Indiana, and summer's heating up. School’s out, there’s a brand new mall in town, and the Hawkins crew are on the cusp of adulthood. Romance blossoms and complicates the group’s dynamic, and they’ll have to figure out how to grow up without growing apart. Meanwhile, danger looms. When the town’s threatened by enemies old and new, Eleven and her friends are reminded that evil never ends; it evolves. Now they’ll have to band together to survive, and remember that friendship is always stronger than fear."

Watch the new trailer below...