When the director of a Long Island zoo is murdered by snake venom, Kristy Farrell—former English teacher turned wildlife reporter—takes a personal interest in the case after her brother Tim, the zoo's curator in charge of reptiles, becomes the leading suspect. Although the evidence is circumstantial, Kristy is sure that someone is out to frame Tim. Believing that the killer is one of her brother's colleagues, Kristy investigates the internal politics and personal relationships at the zoo. As she delves into each suspect's life, she uncovers weak alibis and powerful motives, including greed, blackmail, infidelity, and revenge. Meanwhile, the zoo is plagued with accidents, a second murder occurs, and then Kristy's life is threatened. With everyone's nerves on edge, Kristy races to find the truth... before the killer strikes again.