Tensions rise in the office as Argentinian sister and brother, both horny and irritated, find themselves alone. The brother, frustrated, starts masturbating in his cubicle, his moans echoing through the empty space. His sister, overhearing, gets wet and decides to join in, fingering herself under her desk. Caught in the act, they argue heatedly, the sister calling him a 'pendejo'. Later, they make up, and she asks him to fuck her hard on her desk, their workplace becoming a den of taboo lust.