In the suffocating heat of Sunday noon, Domingo, the pious father, commands his two daughters to stay in their room and pray. Bored and restless, the sisters, Maria and Lucia, find solace in each other's company, their eyes lingering on their father's stern face as he leaves. Their hands wander, touching, caressing, exploring each other's bodies under the guise of innocent hugs. Their breaths hitch as they realize their desires, their hearts pounding with fear and excitement. They're about to cross a line, their innocence about to be shattered in this forbidden dance of sisterly love.