William McNamara plays Jeremy, who was given up for adoption 24 years ago and has never gotten over it. After killing his adoptive parents, his birth father, someone’s mistress, and a private investigator played by Tia Carrere, Jeremy wants to celebrate his 25th birthday by killing his birth mother, Sandy (Lesley Anne Warren). However, Jeremy wants to draw out Sandy’s suffering so he comes up with a plot so complex that it’s hard to believe that anyone could actually pull it off.
After Jeremy finds out that Sandy’s new husband, Ted (Donald Sutherland, massively slumming), is the head of a small brokerage firm, Jeremy reads every book that he can find and somehow become an expert on the stock market. Even though Jeremy could have a high-paying job with any firm, he wants to work for Ted’s little firm. Ted hires Jeremy and Jeremy proceeds to worm his way into Ted and Sandy’s life. Jeremy also frames Ted for securities fraud, which leads to Ted losing his job and being blacklisted by all of Ted’s highly ethical Wall Street colleagues. (Yes, I managed to write that with a straight face.) Despite the fact that Jeremy is obviously disturbed and that Ted and Sandy’s life starts to fall apart from the exact moment that Jeremy becomes a part of it, only Ted and Sandy’s son, Chris (Christian Tessier), suspects that there’s something strange about Jeremy.
This is one of those dumb revenge thrillers that is dependent upon everyone in the movie being as dumb as possible. Even Jeremy turns out to be dumb. After killing almost everyone that he meets, Jeremy suddenly decides to keep one person alive and, of course, that decision comes back to haunt Jeremy in the end. Jeremy is smart enough that he can trick people into believing that he’s a brilliant stock broker but he’s dumb enough to make an obvious mistake. Of course, everyone else is dumb enough to to not catch on to the fact that Jeremy is a sociopath so the mass dumbness evens out in the end.
Probably the most interesting thing about this movie is that, somehow, Donald Sutherland ended up starring in it. Even great actors have to put food on the table and hopefully, Sutherland ate well as a result of starring in Natural Enemy.