Growing up in a quiet seaside town, Clare O'Brien and David Power shout their hearts' desires into the echo cave, praying their destinies will carry them far away from Castlebay. Years later, their paths cross again. David, following in his father’s footsteps, is studying medicine and Clare has won a scholarship to University College. But eventually Castlebay will draw them back and, against a backdrop of empty grey skies, sea-spray and howling winds, this drama of ambition, betrayal and love will reach its turbulent conclusion.