Late one night on a country road, Tun and Jane accidentally run down a mysterious pedestrian. Fleeing the scene, they return to their lives in Bangkok, but soon discover things have changed. Nightmares haunt Jane's dreams while Tun, a photographer, begins to see mysterious shadows in his developed photos. As Tun investigates what could cause such photographic anomalies, his past comes back to haunt him, one by one his closest friends begin to die and Tun must unravel the mystery of why he is plagued by this malevolent force before it unravels his life.