Mysteriously, Voyager comes upon a floating Borg Vinculum - a device that interconnects Drone's minds aboard a Borg vessel - which swiftly causes Seven of Nine to manifest personalities other than her own. Janeway is crushed to learn that before Tuvok, The Doctor and she can intervene, Seven may be completely lost.

B'Elanna is attacked by an alien that latches itself onto her body. The Doctor creates another holographic physician, a Cardassian exobiologist named Dr. Crell Moset, to save her life. But Torres refuses treatment when she learns that the physician engaged in unethical wartime medical practices.