The quiet life in a Cornish beach resort is disturbed since the arrival of 'newcomers'. Actually they're also relatives of leading businessman Mark Penwarden, who has an old, deep grudge against his brother Daniel, who returned years after a tragic boat incident to open a surf shop. Their children engage in mateship, romantic friendships and rivalry with each-other and a few other locals, further complicating the fraternal households 'entanglement.