Wellington, New Zealand. A mutilated corpse is discovered in residential parkland, sending shock-waves through the Pacific populace. With little to go on, Detective Wolf Bowman and his team are tasked with catching the murderer. But Wolf has secrets of his own. After dark, he finds criminals who have escaped the law, dispensing savage justice. Now, someone is tracking his clandestine vigilantism and threatening to expose his dark secrets. With the hunter becoming the hunted, Wolf must race to catch a violent killer before being collared himself.