What does it mean to be Human? Bud, the android, yearns to find out, as his newly discovered emotions for the surgeon Dr. Grace Lord blossom. The bond between Grace and Bud is tested to its limit, as the two experience danger, separation, loss, agony, and despair, battling an evil nemesis bent on revenge. Will they be able to save each other and, ultimately, the Nelson Mandela Medical Space Station from total annihilation?