Rafael is a handsome young man employed to maintain the swimming pool at a wealthy family's secluded, modern estate. Taking advantage of the owner's frequent absences, Rafael turns his shifts into a series of highly active, casual sexual encounters, engaging in passionate affairs right on the property with both Roxane, the housemaid, and Pilar, the live-in nanny. However, their physical infidelities are quietly observed by Nico, the family's young, detached five-year-old son. Exposed daily to the explicit, unrestricted sexual behavior of the adults around him, Nico develops a bizarra, silent fixation on the pool cleaner. This psychological obsession culminates when the young boy corners Rafael with a highly unsettling, manipulative demand. Terrified of exposure, unmasked by his own reckless actions, and buried under a sudden wave of deep paranoia and intense internal guilt, Rafael watches his easy paradise rapidly transform into a claustrophobic, waking nightmare.