Dr. Arthur Zeller is the doormat of the anthropology department, a mild-mannered professor who is the butt of his colleague's jokes and who never gets the respect he deserves. After the department head, Prof. Martin Stansfield passes over his cutting-edge research into evolutionary psychology and funds the project of his rival, Dr. James Feind, Zeller takes matters into his own hands. In the past, he injected timid rats with the gene for dominance. Now he injects himself with genes drawn from homo erectus, hoping to turn himself into an alpha male. It works. he's bolder and more powerful but, there are side-effects: he has strange headaches and in a fit of rage he beats Dr. Stansfield into unconsciousness. He gets it into his head that he must mate with Laura White, Stansfield's attractive grad student girlfriend, so he secretly injects her with the gene for submissiveness. She rejects his advances and he comes to his senses but by now the changes are coming t