Dr. Craig was arrested for conducting unethical experimentations on human test subjects. Having circumvented imprisonment, he built a secret laboratory beneath the city's sewage system. In the last moments of his life, the maniac managed to complete and successfully unleash a lethal neurotoxin into the city. Time is running out… the toxin will soon take effect. Your only option is to venture into the sewers, locate the lab and retrieve the serum before it's too late...