Doug and Abi are taking their three children on a trip to Scotland for a big family gathering, but the couple are in the midst of a difficult divorce and have asked their kids to keep it a secret from the rest of the family.

From nine year old Lottie's notebook to keep track of the lies so she remembers which ones to tell, to four year old Jess's perverse attachment to a brick named Norman, for their parents a week has never seemed such a long time.

But it's middle child Mickey and his granddad's shared passion for Vikings which gives rise to the most far-reaching and unexpected consequences. When a day at the beach turns to tragedy, the children take matters into their own hands.