Women On Sailboats Does Anybody Know The Title To This French Movie?

Does anybody know the title to this french movie? - women on sailboats

I can not remember the title or the plot as I remember lol I remembered what looked like the poster. It was a deep and two persons (man and woman) swim in the sea, and seems to cry, as if drowning or something she pulls down. He also had a sailboat in the background, I believe, on a sunny day Lol I think it's a horror movie, but I'm not sure, in summer 2007 (August which I believe was published). If you know then? I forgot lol