Barry and Robyn Henwood love the environment in different ways; his is a passion for green technology, while she loves turning native flora into textiles and teaching yoga. They're building a stylish beach shack to retire in, one that floats on a pair of untouched sand dunes in Aldinga on Adelaide's southern coast. Solar-powered, and aesthetically pleasing, it should be the perfect fit, but Robyn is yet to be convinced. Her life is entrenched in the city so she needs some cajoling. The contemporary modest design features a pair of steel clad pods joined by a timber walkway, and surrounded by native bush. But as soon as building gets under way, the excavation impacts on the environment. Despite their best efforts replanting and shoring up the dunes, the beach scrub soon dwindles and Robyn and Barry are left pondering their next course of action. As the dunes progressively erode, the more Robyn and Barry persevere. But when their self-rusting steel cladding is battered by harsh coastal conditions, staining their deck and turning the exterior into something resembling dribbled fat, Robyn's doubts really set in. Can they restore their precious landscape and will Robyn eventually sever her ties with the city and make her project in the dunes home?