B'Elanna's shuttle runs into an ion storm upon her return to Voyager. As the shuttle hits the deck, she is thrown forward and hits her head. She is diagnosed with a mild concussion and she retreats to her quarters to rest. Chakotay brings her a metal slat with a Klingon insignia that was found attached to the rear of the shuttle.
B'Elanna puts the object down on her table and she notices that blood begins to pool out of it. She also hears haunting screams and otherworldly cries of pain radiating from the artifact. Tuvok suggests that she was experiencing a subconscious manifestation of her hatred of her Klingon heritage.
Neelix decides to throw a party to celebrate the discovery of an object from Voyager's Alpha Quadrant. Just as B'Elanna is to say a few words, a group of Klingons appear and kill Captain Janeway. No one else sees what is happening and as B'Elanna tries to escape, she too is attacked.
B'Elanna finds herself lying on the deck of a Klingon ship. A Klingon approaches her and holds a branding iron to her cheek. However, it doesn't embed the Klingon emblem since she is only half Klingon. A Klingon male named Brok'tan tells her that she is on the Barge of the Dead traveling to Gre'thor, or Klingon Hell, where dishonored souls are taken.
Next, it is announced that another dishonored soul has been delivered. B'Elanna is completely shocked to find that it is her mother, Miral. Suddenly, B'Elanna wakes up in the Sickbay. Apparently, she was in a coma after her shuttle was caught in the vicious ion storm.
B'Elanna tells Chakotay that she thinks she died and was on the Barge of the Dead. Later, after reading old Klingon scrolls, she tells Paris that she sent her mother to the Barge because of her dishonor. B'Elanna believes that she can save her mother before she passes through the gates of hell by restoring the honor that was lost.
B'Elanna has a difficult time convincing Captain Janeway to alter her vital signs. Janeway only gives her one hour to accomplish this task. B'Elanna loses consciousness and finds herself back on the Barge of the Dead. Brok'tan will help B'Elanna get to her mother by distracting the guards.
Initially, Miral believes that her daughter is only an illusion. B'Elanna finally convinces her mother that she can save her from Klingon hell and send her to Sto-Vo-Kor. After performing the ancient Klingon ritual, B'Elanna and Miral and disappointed with the failed results.
B'Elanna's only other option is to die for Miral and take her place in hell. B'Elanna agrees and Miral is taken up towards the sky to Sto-Vo-Kor. The gates of Gre'thor open ahead of the Barge and B'Elanna is lead to her own hell aboard Voyager.
Suddenly, Miral appears to B'Elanna and tells her daughter that she can be saved by freeing herself. All B'Elanna has to do is live with honor and discipline, like a true Klingon. Suddenly, The Doctor begins to bring B'Elanna out of her comatose state. Miral tells B'Elanna that they will be reunited forever in Sto-Vo-Kor.