Disgraced former DS Don Beech returns to London and pulls off a £6·5million robbery. Ex-DI Claire Stanton, now with a security firm, is assigned the task of retrieving documents stolen in the heist.

Beech takes Stanton to an underground bunker where Frankie urges him to kill her. When he refuses, Frankie decides she'll have to do it herself.

Now that DS Peters is convinced that Beech is alive, Stanton is missing and the race is on to get to her in time.

Beech escapes to London but loses contact with Frankie. Is Beech about to be double-crossed or is it all a misunderstanding?

Beech escapes yet again, but is later betrayed and Stanton goes in for the kill. Is this the end for Don Beech?