The film begins with a man giving a lift to a woman, after that unknown people attack the house and want to kill them, and towards the end of the film it turns out that the man is a serial killer and the woman is an agent, and this is all an operation, they wanted to catch him alive, one of his victims he hid the bottom of the created pond near his house.
Theast words of killer is: Just not enjection, or electric chair