Yuriko Hosokawa, bored with her mundane office life, meets Mukai by chance and begins living with him. One day, Mukai asks her to steal confidential documents about a new product being developed at her company. Yuriko sneaks into the empty office and obtains the files, but is caught by Hayami. To keep her quiet, Hayami demands sexual favors. However, it turns out Mukai and Hayami are working together and deliberately set her up. Realizing the truth, Yuriko becomes furious and enraged at being manipulated.