The Avengers spend a late Halloween night watching BuzzFeed Unsolved, exchanging in the usual banter, until their fun is interrupted by a series of alarms. F.R.I.D.A.Y., however, doesn't know why the alarms went off in the first place. With every spooky adventure comes poor decision, theirs being the choice to split up into groups to find what could have triggered the security system. Team Tony, Team Steve, and Team Natasha explore an eerie, empty Avenger's Tower in the middle of the night in hopes of solving this mystery.