Beneath the watchful gaze of a crucifix, two siblings, bound by blood and religious upbringing, find solace in each other's arms. The brother, a strapping youth, has been harboring secret desires for his sister, a raven-haired beauty with a body that could tempt a saint. In the dead of night, they sneak into each other's rooms, their hearts pounding with fear and excitement. In the soft glow of a nightlight, they explore each other's bodies, their fingers tracing the curves and lines they've known since birth, but never like this. Their lovemaking is a dance of sin and salvation, their moans a hymn to their forbidden love, their bodies a temple to the carnal pleasures they've been taught to deny.