The film shows a man sitting on the rocks cleaning mussels. With precise gestures, he detaches the mussels from their shells, dips them in the water and throws them into a pot placed in front of him. In the background, two women and two children emerge from the water, probably having just emerged from a bath. The next scene shifts to an outdoor lunch: a picnic on the beach under tents. A small table is set with a plate of spaghetti, which appears to be topped with freshly picked and cleaned mussels, although the black and white of the film makes it difficult to identify the dish with certainty.