While on a planetary mission, the captain and Chakotay crash and are killed by the Vidiians. Suddenly they are back aboard the shuttle approaching the planet where they recognize the sense of deja-vu. This time they recognize a Vidiian ship and attempt to outrun it, but fail and loop back to the beginning of the sequence again. Now they make it back to the ship, but Chakotay has no memory of the time loop. Janeway has the Doctor examine her and is shocked to learn that she's been infected with the Vidiian phage.