Olivia and her four friends hold a purifying water fast in her secluded cottage. Docile and introverted, the girl is easy prey for her deceitful guests, who ridicule her and her vanishing twin – an unborn child absorbed by Olivia in the womb. Torment takes hold and Olivia ferociously removes the only palpable link she has with her dead twin – a tooth lodged beneath the skin of her shoulder. But discarding it down the drain only brings the horrific past to the surface. Just as water awakens his hidden life, it is water that will gruesomely take life away…