James Murphy is a rugged cryptozoologist, who thirty years earlier, during a trip to Loch Ness, Scotland encountered the fabled "Nessie" creature that killed his father, and left James with a deep facial scar. Thirty years later, James is hunting for Nessie, when his search leads him to the sleepy town of Pike Island, Ashburn, on Lake Superior. Hiring Josh Riley as his guide, James and Josh bond over their mutual scientific interests and deceased fathers, while James tries to convince Josh's mother, Sheriff Karen Riley, that the 60-foot plesiosaur is killing and breeding. James Murphey (Brian Krause 饰)是个健壮的神秘动物学家，在去尼斯湖的途中遇见了传说中的尼斯湖水怪样的生物，它杀害了他父亲，并在他脸上留下了深刻的疤痕。20年后，James追捕尼斯湖水怪，来到了苏必利尔湖上的长矛岛的睡眠镇。他请了Josh Riley做他的导游，James和Josh对科学有共同的兴趣，而且都失去了父亲，所以成为了好朋友。James想让Josh的妈妈Karen Riley治安官相信那个60尺的蛇颈怪正在残害生灵。
