David Tennant, Rosamund Pike and Billy Connolly star in this family comedy written and directed by Andy Hamilton. As Doug (Tennant), his wife Abi (Pike) and their three children prepare to travel up to the Scottish Highlands for Doug's father Gordie (Connolly)'s 75th birthday, they give their children a list of things that are to be kept secret, including the fact that daddy lives in a different house to mummy. While their offspring set about telling Grandpa the ins and outs of their lives down in London, including intimate details of arguments their parents have had, Doug and Abi try to put aside their differences and have an enjoyable weekend.