The harrowing tale of survival and suspicion continues as Molly, Yoshi, and the rest discover that they must cross a deepwater basin patrolled by a deadly predator.

When Aero Horizon 16 crashes in the Arctic, eight children emerge from the wreckage to find themselves alone and surrounded, not by ice, but by a mysterious and deadly jungle full of carnivorous plants and predatory birds--the other five hundred people from the plane are gone, not necessarily dead, but taken by something that lives in the jungle.

"Barlowe Theater stole the life of Greta Mercy's brother during its construction. Now in 1915, the completed theater appears every bit as deadly. When Greta's younger brother goes missing after breaking into the building, Greta engages the assistance of a local police officer to help her uncover the already ghostly secrets of the theater. But when help comes from an unlikely source, Greta decides that to save her family she must put the threat of...

"The Upside Down, a place only seen before in psychic visions and nightmares. Will Byers doesn't know what to call the shadowy realm he finds himself in, but he is certain that he is alone and far away from anything close to safe. A strange shrieking monster lurks around every corner and familiar voices drift through the air from the other side. To survive, Will holds onto the lessons he's learned in the camaraderie of his friends, and the hope that...

"The Upside Down, a place only seen before in psychic visions and nightmares. Will Byers doesn't know what to call the shadowy realm he finds himself in, but he is certain that he is alone and far away from anything close to safe. A strange shrieking monster lurks around every corner and familiar voices drift through the air from the other side. To survive, Will holds onto the lessons he's learned in the camaraderie of his friends, and the hope that...

After tracking down Nine's former doctor with Eight's help, Marcy and Ricky track down the doctor, who reveals what happened to her after the kids fled and where the girl ended up.

Marcy and Ricky rush to the facility where Nine is being kept, but when they arrive, they find it engulfed in flames; they head into the forest to find Nine and have a fiery encounter.