A penniless mother makes an impulsive decision in the jewellery shop where she works, and is propelled into a different world.

Joan falls for Boisie and the opulent lifestyle he shows her, and he recognizes her innate talent. Meanwhile, despite enjoying the spoils of crime, she faces scrutiny as a mother.

Joan is determined to escape the wrath of the IRA and a lengthy sentence by masterminding an audacious inside man heist, but it may come at a price.

When disaster strikes on the day of the heist, Joan is forced to decide between her dream of a happy family or confronting the consequences head-on.