Based on infamous true events, a famous thief, Brian Reader (Sir Michael Caine), pulls together a band of misfit criminals to plot the biggest bank heist in British history. The thieves manage to escape with allegedly over £200 million worth of stolen jewels and money. When police are called to the scene and the investigation starts, the cracks between the eccentric gang members begin to show as they argue over how to share the goods and become increasingly distrustful of each other.