Now those days have come back to haunt him. While traveling through an uncharted nebula, Tuvok is besieged by recurring memories of his time with Captain Sulu -- repressed memories that may well kill him unless their source is determined in time.
To save her closest friend, Captain Kathryn Janeway follows Tuvok to the century-old bridge of the Excelsior during a desperate battle. There Tuvok, Captain Janeway, Captain Sulu and Commander Janice Rand must face a menace to galactic life unlike anything known before. . . .