The end of American Hustle sees the downfall of con artist Irving Rosenfeld (Christian Bale) and his partner-in-crime, Sydney Prosser (Amy Adams). The two have been working together to con people out of their money, but things start to unravel when they get involved with a dangerous mobster, Victor Tellegio (Robert De Niro).
The FBI eventually catches on to their scheme and starts investigating them. This leads to a huge showdown between Irving and Sydney, with the latter ultimately betraying her partner. In the end, Irving is arrested and sent to prison, while Sydney manages to escape punishment.