For as long as Jack can remember, he and Danny have been friends, and Danny has always gotten Jack into trouble. He's had a few brushes with the law and blows up half a high street before deciding to turn to acting. Everything is going well until Jack lands his first feature film role and Danny agrees to shadow 'the family'. Jack soon realizes he is way over his head with deadly and hilarious consequences.

A banker has died. He trafficked in nuclear material, so French intelligence assign two agents to find his list of contacts, which are on a flash drive: Muriel - the boss, acerbic, willing to sleep with any man, wondering if she should have a child - and Philippe, younger, boyish, meticulous, bothered by Muriel's frank sexual interest. They watch Constance, the banker's widow: a naïve, friendly, open, trusting. She's taking opera lessons, so the French spies join the class, which Muriel enjoys. It seems that other spies are after the same USB, and some of them sing as well. Singing, spying, and sex lead to duets of all kinds as well as to an eventual showdown.