In the grimy, labyrinthine tunnels of an abandoned metro, two strangers cross paths in the dead of night. Driven by primal urges, they shed their clothes, the cold concrete their only witness. The man's thick, veined cock stands erect as the woman, her pussy already dripping, straddles him against the wall. Their bodies slap together in a raw, anonymous coupling, the echo of their moans resonating through the desolate station.