When a mysterious animal attack leaves a mutilated body in the forest, a conservative small town detective must enlist the help of an eager wildlife specialist to uncover the dark and disturbing truth that threatens the town.

A titular presence terrorising a young couple and their son.

美国肯塔基州的Druid Hills以出产大量的玉米为名，但在这里发生了怪异的事情。玉米田中出现了遭受怪物攻击的受害者，而目击者说怪物是「在玉米田中游来游去的大白鲨」！同时，用鲨鱼的下颚和尺齿当凶器杀了数十人的连环杀手Teddy BoLucas被逮捕了。警长Vera Scheider（夏侬史塔汀 Shannon Stockin 饰）想确认她失踪的双胞胎姊妹Lorna…