Enterprise receive energy readings identical to those emitted by positronic brain of android crew member Data. When investigated further they discover disassembled parts of an identical android named B4 (an early prototype of Data), now scattered all over the surface of a remote world. A coup forms in the installation of a new Romulus and Picard is ordered to negotiate with Shinzon. Shinzon is human and a slave from the Romulan sister planet of Remus. It soon becomes clear that B4 was used as bait to lure Enterprise to Romulus and Shinzon wants to destroy the Earth. A vicious battle forms between Shinzon's powerful warship and the Enterprise.