The brave and moody François, a window washer by trade, has fallen head over heels in love with a delicious woman he spotted while working on the 17th floor of a building. From that moment on, all his dreams turn to the woman he doesn't dare approach. Fortunately, he finally meets her in Perros-Guirec, after following her on a train journey. She calls herself a chatelaine; he introduces himself as a writer. Will love triumph over these pious lies?