On a deserted stretch of beach a middle-aged couple, relaxing after a picnic lunch, talk idly about home, family and their life together. She sketches, he naps, and then, suddenly, they are joined by two sea creatures—lizards who have decided to leave the ocean depths and come ashore. Initial fear, and then suspicion of each other, are soon replaced by curiosity and, before long, the humans and the lizards (who speak admirable English) are engaged in a fascinating dialogue.