Retired astronaut Sunul Burke receives word his sister has cancer and is coming to the United States for treatment. The large pharmaceutical industry sends goons after the two children that possess the sure cure: their blood. The children are to be eliminated. But no one knows where the children are. The next best thing is to obtain a sample of blood from Shania Winslow, a doctor stationed on Mars, cured of cancer by the children's blood eight years ago. Sunul goes to Mars to bring back a sample of the doctor's blood, not knowing if the treatment will work. Attempts on the doctor's life occur and Sunul devises a plan to get the doctor back to Earth secretly. The race for blood or death is on.