Darwin, a senior photographer who consistently uses a manual camera, is shocked to discover the appearance of a womans shadow in every photo he takes. Soon, the womans figure appears in real life, terrorizing him. Pia, Darwins girlfriend, decides to investigate the womans identity. It turns out the woman is Lilies, an outstanding student who once studied at their university. When Darwins friends die one by one, Pia is convinced this is related to a sin Darwin committed in the past.