PTSD strikes Seven of Nine, causing frightening visions and prompting her, under a panic attack, to seek the Borg Collective where no Borg exist.
Amid Janeway's negotiations with a cautious and xenophobic race of aliens for passage through their region of space, talks are disrupted when Seven of Nine, believing herself summoned by the Borg, forcefully leaves Voyager to rejoin the Collective, heading into the aliens' territory.