On the eve of their engagement ceremony, Gu Nanchen learns that his fiancée, Xu Zhixia, is going to complete a 'temporary engagement' with someone else, and even asks him to continue bearing project responsibility. Facing the dual imbalance in emotions and career, he chooses to leave gracefully, taking his mother and partners to Ningcheng to start a business from scratch. Meanwhile, the old company falls into crisis due to safety management issues. Gu Nanchen insists on solving problems with facts and rules, guarding his bottom line in choice after choice, and rediscovering trust, responsibility, and affection. In the end, he says goodbye to the inappropriate old vow and welcomes his own new life.