The delicate balance between Piltover's wealth and Zaun's dark underbelly. Tensions between these city-states reach a breaking point when hextech, a method for anybody to control magical energy, is invented in Piltover, and a new narcotic called shimmer transforms humanity into monsters in Zaun. Arcane draws life to the connections that define some of League of Legends' most famous champions, including Vi, Jinx, Caitlyn, Jayce, and Viktor, as the competition between the cities breaks families and friends.