Colin lives together with Mouse, the friend of his house. Colin is waiting for his friend, engineer Chick, whom he invited for dinner. His cook Nicolas is reading the recipes from the cook book. Chick arrives, and Colin shows him the "piano-cocktail", his own invention – the piano that makes cocktails. Chick plays an improvisation on Duke Ellington themes and then tells him about Alise, the niece of Nicolas, whom he met at the conference of Jean-Sol-Partre (a broad hint on Jean-Paul Sartre). They both go skating.