When Regina is accused of murdering a beloved fairy-tale character, Emma thinks she is innocent; Prince Charming and Snow White plan the evil queen's execution.
Gus and Shawn spend a weekend searching for a missing teen at a comic-book and sci-fi convention.
The team is headed to Russia to rescue Lyla, but things get messy when Isabel insists on joining Oliver's "work trip."
Oliver learns a man who goes by the name "The Mayor" is bringing illegal guns in to The Glades, so he sponsors a "Cash for Guns" event to help clean up the city. Unfortunately, The Mayor crashes the event with his gang.
When Slade kidnaps someone close to Oliver, Oliver realizes sometimes you must do the unthinkable to stop the monster.