In New York's Central Park, Assistant DA Alex Cooper and Detective Mike Chapman race to track down a serial killer before yet another young woman is found dead. Is the body found in the Ramble the first victim of a deranged psychopath, or could other missing women be connected to this savage attack? The enormous urban park, a sanctuary in the middle of the city for thousands of New Yorkers and tourists who fill it every day, may very well become a hunting ground at night for a killer with a twisted mind.