A psychotic serial killer is unleashing indiscriminate death among the elderly, using a unique and diabolically dangerous device. The old people are apparently dying of influenza and the deaths are accepted as from natural causes. Sheriff Cnut and his team are fighting a losing battle against a powerful, informed enemy. Shockingly, as the death toll rises, Cnut learns that the killer is a highly disturbed figure from his own hidden past. Constant, electrifying action leads to a terrifying climax, where the Sheriff's own life hangs by a mere thread.
