Llywelyn farms a beautiful valley in remote Wales. His wife and son have recently died and he lives with his daughter Nerys and her toddler son Davie. Iolo, father of Davie has just been released from prison for violence and wants to get back with Nerys. Llywelyn has fought every way he can to stop a reservoir being built at the entrance to the valley and his land drowned. He is at his wits end and Nerys is worried about Iolo's growing influence over Llywelyn and inciting him to violence. Howard, a phd student, is doing research there and Nerys is falling for him, much to Iolo's jealousy and anger. But Howard is more interested in Chrissie who lives nearby with group of hippies. This is a story of society's needs against the individual's. A rural community must deal with their lives being disrupted and overturned by the modern world's insatiable demands.