Star Trek: Insurrection

Captain Picard and the crew of the Enterprise-E travel to a planet that is a virtual fountain of youth. There, they uncover a conspiracy involving the highest levels of the Federation and their alien allies, something that betrays the very foundations the United Federation of Planets was founded upon. Picard resigns as Captain and leads his crew in a potentially treasonous fight of armed resistance in order to protect the alien inhabitants of this miraculous world.