On a mission to an unexplored planet near the Klingon/Romulan border, the U.S.S. Enterprise travels to the planet Eloh to negotiate Federation memebership. But upon arrival, Captain Jean-Luc Picard and his diplomatic team find themselves face to face with Commander Sela, an old Romulan enemy - who's there to convince the Elohsians to join the Romulan Empire. When a series of fatal indidents casts suspicion on both delegations, Data must form an uneasy alliance with Sela to prove the innocence