The script begins in a crowded underground train station. Following a jostle, a man and a woman argue, under the amused gaze of the other passengers. Their oratorical joust is loud and charming. A few moments later, in the corridors of a station, the two strangers awkwardly make love in a photo booth. Back on the surface, they are about to separate... Well, goodbye, anyway... We're not going to spend the night saying goodbye! ... But why not?