Ed and Charlotte have been married for 15 years, but they have been drifting apart and now Ed suspects that Charlotte may be involved with another man. He decides a family holiday is just what they need and rents a cottage on the cliffs near the picturesque Cornish village of Pendruggan. He is desperate not to lose Charlotte and hopes that the holiday will bring them closer together again, but she is wondering what happened to the man she fell in love with. So into their car they all pile, including their teenage daughter, Alex, her younger brother, Sam, and their enormous bearded collie, Max. Will their Cornish escape be the holiday to make them ... or break them?