Hana Yukawa is an ordinary office lady who can be found anywhere. She is tricked into joining a multi-level marketing company that hires people while hiding her true identity, and receives an unreasonable reprimand from her boss. She was deeply traumatized by a certain incident, but there was no one around her that she could talk to about it. Meanwhile, after seeing a popular YouTuber's introduction video, she becomes obsessed with the cult religion "Nirvana" in search of salvation for her soul.

Hanako is having nightmares about a blue bucket and red blood. What is the secret hidden in her nightmare?

都内の病院で、事務職として勤務する新人OLの女性。彼女は、陰湿な職場に、孤独を抱えていた。そんな彼女に対し、彼は無関心な態度で冷たく突き放す。追い込まれた彼女は、やがてある復讐計画を思いつく。狙いは職員の抹殺。夜な夜な自宅で不気味な実験を繰り返し、恐ろしい計画を立案し、復讐代行業者へ依頼する。一方で、彼女の計画を邪魔する思わぬ妨害者が立ちはだかるのだった…。