There are more crossed lines, missed deadlines and communication nightmares as Mum and Dad try to find out where their children are. Jake is trying to get home with no money or means of transport, Ben is meeting lots of interesting strangers, and Karen is having a life-changing conversation with her headmistress.

It is Boxing Day, and the Brockman family have to carry out a special mission for Grandad. They encounter car problems, child problems, parent problems, emotional problems and World War Two. If the adults can't sort things out, the children will have to. Like all families, everything has changed and everything remains the same.