在这部变形蛇魔恐怖/科幻/惊悚片中,大学生戴维·布莱克(本尼提克)被蛇学家斯托纳医生(马丁)聘为助手。斯托纳的前助理在没有告知任何人的情况下诡异的离开小镇。一开始,斯托纳要为戴维进行注射，据称是为防止戴维被蛇咬伤。戴维与斯托纳的女儿克里斯蒂娜(孟席斯)开始一段恋情。戴维对注射的副作用感到不安。克里斯蒂娜参观了一个嘉年华畸形秀。其中“蛇人”与斯托纳的前助理离奇的相似。戴维发现他被改造成一条眼镜蛇，当他试图逃跑时被猫鼬杀害。
David, a college student, is looking for a job. He is hired by Dr. Stoner as a lab assistant for his research and experiments on snakes. David also begins to fall for Stoner's young daughter, Kristina. However, the good doctor has secretly brewed up a serum that can transform any man into a King Cobra snake-and he plans to use it on David.
