As Riker tries to save the Enterprise and the Earth from a powerful alien race, Captain Picard's life hangs in the balance. The crew faces their own demons and must overcome their own obstacles to continue their mission. This leads Data to return to his creator to better understand emotions. Worf must accept his Klingon heritage and face his former family. A power struggle threatens the Federation as the Romulans try to make peace with their universe and the Klingons deal with a potential successor to their empire. Political relations are strained within the Enterprise as a rogue ship attacks former enemies of the Federation, ultimately leading up to a civil war where one member of the Enterprise must decide where his loyalty lies.