Jeffrey 'The Dude' Lebowski, a Los Angeles slacker who only wants to bowl and drink White Russians, is mistaken for another Jeffrey Lebowski, a wheelchair-bound millionaire, and finds himself dragged into a strange series of events involving nihilists, adult film producers, ferrets, errant toes, and large sums of money.

Following the events of Age of Ultron, the collective governments of the world pass an act designed to regulate all superhuman activity. This polarizes opinion amongst the Avengers, causing two factions to side with Iron Man or Captain America, which causes an epic battle between former allies.