After Will sees something terrible on trick-or-treat night, Mike wonders whether Eleven's still out there. Nancy wrestles with the truth about Barb.
In flashbacks, Eleven manages to escape from the Upside Down, but is forced to remain hidden in the woods to avoid the government agents. In the present day, the kids prepare for Halloween. Eleven asks to go trick-or-treating, but Hopper insists that she needs to remain hidden.
Hopper investigates when pumpkins patches all over town suddenly start rotting. Nancy wants to tell Barb's parents the truth about Barb's death, but Steve insists that it's a bad idea, as the government agents might come after them if they told anyone the truth. Instead, they attend a Halloween party, where Nancy gets drunk and berates Steve until he leaves. Jonathan takes Nancy home.
Mike, Will, Dustin and Lucas go trick-or-treating, later joined by Max. During the night, Will has another episode and tells Mike about his visions. Mike admits that he's still trying to contact Eleven. Eleven tries to contact Mike using her powers, but is unsuccessful. Dustin returns home after trick-or-treating, and finds a strange creature in his trash can.
