In 2000, a motley gang of criminals plan one of the most daring heists in British history: stealing an enormous diamond from the Millennium Dome.

An elite department of the Met Police connects the gang to a previous crime — and starts to suspect they might be planning something even more audacious.

As the day of the heist gets closer, both criminals and coppers get ready to strike. Can the gang pull it off — or will the Flying Squad get there first?