In A BIGGER SPLASH, rock legend Marianne Lane (Tilda Swinton) is recuperating on the volcanic island of Pantelleria with her partner Paul (Matthias Schoenaerts) when iconoclast record producer and old flame Harry (Ralph Fiennes) unexpectedly arrives with his daughter Penelope (Dakota Johnson)and interrupts their holiday, bringing with him an A-bomb blast of nostalgia from which there can be no rescue.   A BIGGER SPLASH is a sensuous portrait of desire, jealousy and rock and roll, under the Mediterranean sun.