Lucky Number Slevin (2006)

A man in a wheelchair tells a stranger about a rigged horse race in 1979 that leads to the tragic downfall of a family in the confines of an airport waiting room. In Manhattan, two bookmakers and the son of a powerful mobster die. Amidst the chaos, a young man recovering from a tumultuous week is mistakenly identified by two thugs as his absent friend. This twist of fate plunges him into a world of crime, where he must confront the ominous task of assassinating the son of a rival Mafia leader.