Mayhem tells the story of a virus that infects a corporate law office on the day attorney Derek Cho (Yeun) is framed by a co-worker and wrongfully fired. Chaos erupts throughout the office as the victims of the disease begin acting out their wildest impulses.
Joining forces with a former client (Samara Weaving) who has a grudge of her own, Derek savagely fights tooth and nail to get to the executives on the top floor and settle the score once and for all.
The two employees having sex in the background of Derek’s video were actually having sex on set. The actor and actress were in a relationship.