Noriko's Dinner Table takes place before, during, and after the previous installment's timeline as an attempt to resolve several questions left unanswered.

Themes explored include the generation gap in modern families, the malleability of personal identity, social alienation, suicide, and the use of the Internet.

A shy and demure 17-year-old girl named Noriko Shimabara (Kazue Fukiishi) lives with her quiet family, formed by her sister Yuka (Yuriko Yoshitaka), her mother Taeko (Sanae Miyata), and her father Tetsuzo (Ken Mitsuishi), in Toyokawa, Japan.

There, after making new and unknown friends, she feels truly at "home" and eventually, on December 10, 2001, runs away from her unhappy life to Tokyo, where she plans on meeting the website's leader, a mysterious girl who uses the screen name "Ueno Station 54".

Corp. Tetsuzo attempts to put on a brave face after Yuka's disappearance, but his wife Taeko's mental condition deteriorates rapidly and she eventually commits suicide.

His investigations reveal Haikyo.com and taking a cue from sensationalist media tabloids, he concludes that his daughters are part of a cult called the "Suicide Club".

Corp, who refutes the existence of a "suicide club" and instead expounds on a concept of social roles that forms the basis of his organisation.

As the session falls apart, thugs from the organisation arrive on site to beat up Tetsuzo, who attacks them with a knife and kills all of them in the living room.

Kumiko arrives from her errand shortly thereafter, playing out her role as if nothing is wrong, but then imploring Tetsuzo to kill her and run away with Noriko and Yuka.