Porco Rosso was once a WWI hero and was mysteriously transformed into a pig when his squadron was wiped out. Now a mercenary guarding cruise ships from aerial pirates, he is shot down when they hire their own mercenary. Landing near Milan, he finds an airfield run by ageing mechanic Piccolo and his granddaughter Fio. Soon, with his trademark red biplane ready, he's set to take to the skies again.