In a race against the clock, a father struggles to find the origins of The Whistler's curse to stop the gradual possession of his daughter by the supernatural entity.
According to folklore from the Los Llanos natives of Colombia and Venezuela, centuries ago a child murdered his miserable wretch of a father, and when his family tortured and killed the boy as retribution, he came back as a ferocious ghost dubbed "el Silbón" (or "the Whistler"), who now descends from the trees after whistling an ominous tune to savage drunks and philanderers.