Peter Green is a coach driver, who lives a life of ordinary routine, troubled by his disaffected daughter Kayla and ailing mum Joy. Overworked and overwhelmed, Peter is frustrated by the lack of support from his brother Barry, who has emigrated to Australia. The trip of the day is Dunkirk, as Green and his co-driver Squeaky Dave prepare to take a group of pensioners to visit the war graves in France. But what should be an ordinary day is turned upside down when the docile town of Bognor is confronted with two unexpected arrivals.