Richard Gaddis (John C. Reilly) is a Los Angeles con man in search of a new partner. Enter Rodrigo (Diego Luna), a young grifter pulling minor scams in a casino. When Rodrigo is caught by a savvy waitress who senses his scheme, Richard steps in, posing as an undercover cop, and escorts him out. Much to Rodrigo's surprise, Richard asks him to be his partner-in-crime. Over the next 48 hours, their skills are put to the test as Richard is given a potentially lucrative chance to deliver a counterfeit bank note to a wealthy guest (Peter Mullan) at the hotel where his sister, Valerie (Maggie Gyllenhaal), is the concierge. But is he trustworthy, or is Rodrigo just another one of his unwitting marks'