Star Trek The next Generation Balance of Power

When a famous Federation scientist dies, his son sells his inventions to the highest bidder, Federation, Klingon, Romulan, or Cardassian. Among the items at auction is a photon pulse canon capable of punching through a starship's shields with a single shot. Meanwhile, Wesley Crusher is kidnapped from the Academy by renegade Ferengi, who have set their sights on the photon canon as well, and Captain Picard must outmaneuver enemies on every side to save Wesley and protect the Enterprise from the deadly fire of the new canon.