California's Surf Beach may be haunted by a serial killing GREAT WHITE shark that returns every two years, on virtually the same day, to kill. The trauma has taken a toll on locals who've abandoned this idyllic surf spot, that's suddenly become one of the "sharkiest" places on Earth. The key to solving this mystery is a CSI-style forensic study of the cases, including analyzing the bite patterns left behind and DNA sampling of tooth fragments found in the victim. It will also require a harrowing, near fatal encounter with possibly the largest great white ever caught on camera.