Ex-husband and wife Richard and Kate's biting banter suggests that the flames of their former relationship have not been fully extinguished... Unfortunately the same cannot be said for their retirement nest egg, which is wiped out when Richard's investment firm is defrauded and the pension fund is siphoned away.

Learning that the unscrupulous French financier behind the scheme has just purchased a $10 million diamond for his bride to be, the divorced duo grudgingly agree to set aside their differences and hatch a plot to gate-crash the wedding and steal the rock.

Roped in to assist in the heist are the couple's former neighbours Timothy Spall and Celia Imrie, who are also rooting for their reconciliation. The foursome form an unlikely band of lawbreakers in this comedy caper set against the sun drenched backdrop of the Cote d'Azur.