In the confines of their apartment, the siblings' desire grows with each passing day of isolation. One day, Maria, driven by carnal need, starts to touch herself in the living room. Carlos, returning from fetching supplies, catches her in the act, her pants around her ankles, fingers buried in her wet pussy. He can't help but join her, their bodies entwining in a dance of lust and desperation. The apartment fills with their moans and the wet sounds of their bodies colliding, their taboo passion fueled by the endless hours of lockdown.