He is perhaps the ultimate human achievement: a sentient artificial life-form -- self-aware, self-determining, possessing a mind and body far surpassing that of his makers, and imbued with the potential to evolve beyond the scope of his programming. Created by one of the most brilliant and eccentric intellects the Federation has ever known, the android Data has always believed he was unique, the one true fulfillment of a dream to create children of the mind. But is he? Investigating the mysterious destruction of a new android created by Starfleet, Data and the crew of the U.S.S. Enterprise?