Kim sets out into the real world for the first time on a secret mission. But after encountering hapless brothers Nicky and Jay at their local pub, a seemingly harmless prank sets in motion a series of events that sees them all on the run from murderous gangsters.

Kim faces her dad's killer in an epic showdown while Jay tells a disapproving Nicky that he plans to propose to his girlfriend, Beth. As Kim appears battered and bloody from the fight, having learned from Jimmy that the world is not about to end, she confronts Nicky who comes clean with disastrous consequences.