Liu Jianshe, a key technical specialist, diligently served his factory for twenty years, only to be treated unfairly at the year-end celebration. Determined to stand up for himself, he chose to resign. Without its core technical support, the factory descended into chaos as outsiders mishandled the equipment, causing serious damage and one partnership after another to collapse. Staying true to his principles and professional standards, Liu Jianshe lets go of past gains and losses, returns home to rest, and calmly embraces a peaceful new life.