Arthur is injured during an ambush, and he and Merlin are separated from the rest of the knights. They seek shelter in an old abandoned cabin that has long been used by the Pendragons on extended hunts. Trapped there by the storm Arthur finally reveals his feelings for Merlin.
Originally I wanted to have everyone dressed up like Bucky, including Bucky. But then that seemed pretty depressing so I was going to have Bucky dressed as Captain America but that was depressing in a different way, so I ended up with Bucky-Halloween-is-stupid-Barnes. There’s just no winning with this fandom. Except for Black Widow - who wins at everything.