After losing a project bid, locomotive designer Lin Zhenyi faces failure when her leadership role is taken over by Tan Qingchuan, an overseas returnee. As they work together, Lin Zhenyi learns from Tan and his assistant Jian Aixing’s approach, gaining insight into her own shortcomings. She uses this newfound knowledge to succeed in her next project while navigating romantic pursuits from both Tan Qingchuan and her new neighbor, Li Yanfeng, a research test pilot.