After space engineer Bob Deems is forcibly retired when his project is mysteriously canceled by something called Scimitar, he and his niece Jillian move to the Black Forest region of Colorado. There he modifies a fantastic underground space probe named Diamond Two to look for water under the drought stricken High Plains. Troubles arise when the probe runs out of control and accidentally wreaks destruction, even as a secretive organization headed by the enigmatic Taras Tamonash seeks to operate it for use as a new class of secret weapon. With the help of their new friend Neil Rivera, Bob and Jillian strive to use the limited resources at hand to re-program and stop Diamond Two. However, with its artificial intelligence is it going to accept commands from them or from Tamonash, or does it have a mind of its own?