After losing her husband to karoshi (death from overwork), wife Yukari was forced to continue working at the company, enduring days without even a single day off. Finally deciding to visit the company after her husband's death, Yukari was shocked by the executives' refusal to acknowledge the reality of his overwork death, solidifying her resolve to file a lawsuit. However, hidden from her was the truth that her late husband's colleague, Uemura, whom she had come to rely on, was already entangled in the company's conspiracy. As this truth comes to light, Yukari is forced to confront the realities of her own life and the true circumstances surrounding her husband's death.