Mankind's eternal quest is to move ever forward. In the year 20XX science was on the verge of conquering physical ailment. The limits of micro-processing has been reached and exceeded. It was the age of nano machines. On the eve of the first remote mission into the body one human was on a misguided quest of her own. The quest for an even bigger high.
One man nano-ship accidently winds up inside the body of drug user and your mission is to destroy the drugs, viruses, and all ailments in her system.