Rob Hodgson and Kay Ralph plan to build a sleek glass-fronted house on a crumbling clifftop in Gwynedd, taking inspiration from the villas of California. However, access will be extremely difficult and expensive because of a low bridge over the narrow track to the site, and problems arise when one of the heaviest storms in recent history batters the coast. To make matters worse, erosion specialists predict the property could fall into the sea within just 60 years and the pair are prohibited from reinforcing the cliff face.