We pick up the story as Sam anxiously waits for Bert to be released from a maximum-security prison on grounds of compassionate discharge. Frail and facing her final days, following a cancer diagnosis, Bert's mindset is as it's always been, to take risks and live life on the edge. 

Set in the picturesque mountainous region of Southern Spain, it's apparent from the outset that Sam and Bert have unresolved issues of the thieving kind.

Locked into a pattern of fierce friendship coupled with deep mistrust, that goes back many years, Bert apparently has no one else to turn to in the final weeks of her life. And we sense this isn't going to be an easy ride for Sam, who is clearly burying feelings of guilt, and a past she'd rather stay forgotten.

Pricked by those feelings, she reluctantly agrees to give her ailing former friend a bed in the idyllic smallholding she calls a home. Despite trying to keep Bert at a distance, she is immediately pulled back into their complex and addictive relationship.

On the pretext of one final, multi-million-pound art heist, Bert attempts to lure Sam out of retirement, but at what cost?  Can Sam stay one step ahead of her former friend, who is clearly capable of treachery? Or will the push and pull of their toxic friendship see them both ruined before they are able to pull off the job and escape one another for good?