The film picks up where Avengers: Age of Ultron left off, with Steve Rogers (Captain America) and Tony Stark (Iron Man) disagreeing over the Sokovia Accords, a UN treaty aimed at regulating the Avengers. The Accords would make the Avengers an international organization, subject to UN oversight and control. Rogers believes that the Accords would restrict the team's ability to act freely and protect the world, while Stark thinks that the Accords are necessary to prevent the Avengers from causing harm.