After Deanna's and Will's wedding, the Enterprise picks up a positronic signal from the planet Kolaren near the Neutral Zone where B-4, a prototype of Data, is found. On Romulus, the new Praetor Shinzon of Reman origin, who has assassinated the Romulan Senate, calls for a Federation ship for negotiations. Shinzon reveals himself as a clone of Picard, once created to infiltrate the Federation, but then exiled to the dilithium mines on Remus. It soon becomes clear that Shinzon used B-4 to lure the Enterprise into a trap. He needs Picard's cells in order to survive and, moreover, he is about to use a thalaron emitter against Earth, by which he would kill all life on the planet. In the battle against Shinzon's superior vessel, the Scimitar, Picard's last chance is to ram the ship and to beam over to blow up the thalaron emitter. Data follows him, and he stays to fulfill this task, dying in the explosion of the Scimitar. The Enterprise undergoes repairs, and Riker leaves together with Troi to take command of the USS Titan, while B-4 shows signs that a previous memory transfer from Data to him was successful.