 Returning from an away mission the Delta Flyer is boarded and Tuvok is assaulted by a cloaked alien from a xenophobic race called the Ba Neth. Neurological damage leaves the once-disciplined, logical Vulcan with the mentality of a lost and scared child. With Neelix s help, Tuvok discovers new hobbies and embraces the concept of  fun.  Naroq, a Kesat studying the Ba Neth helps Voyager find the aliens in hopes of answers about their technology and the weapon used on Tuvok. When presented with an operation that will restore him to his old self, Tuvok hesitates, knowing he will lose his lust for life and appreciation for his friendship with Neelix.