Tsukasa Aoi has been married and living a happy life with her husband for two years. They both work at the same company, and her husband is very close to her boss since they’ve collaborated on some shady deals. But the boss was craftier—he held all the incriminating evidence against her husband.
This movie is about a resort trip that the boss deliberately arranged for the whole company, which was actually part of his plan to confess to Tsukasa—even though he knew she was married and her husband was present. During a drinking party with coworkers, he intentionally got Tsukasa drunk and then groped her. He recorded everything to blackmail her.
The movie ends with the boss blackmailing Tsukasa, forcing her to sleep with him right in front of her husband. She keeps begging her husband for forgiveness even though it wasn’t her fault, just because he’s too weak to stand up. Their marriage seems likely to end after that night.