Female captain Yun Ni accompanies Fu Linzhou in building his business for seven years, never getting a promise of marriage. When meeting his family, she is looked down upon by the Fu family, and also catches her boyfriend acting ambiguously with his childhood friend Zhou Ya, resolutely proposing a breakup. After breaking up, she is deliberately suppressed by Zhou Ya in the workplace and urged to marry by her family, leading her to reach a contractual marriage agreement with the calm and restrained air traffic controller Qin Yuxiao. As they spend time together, feelings gradually grow between the two, with Qin Yuxiao repeatedly stepping forward to protect her safety. Just as their romance is heating up, rumors of Qin Yuxiao's "first love" surface, plunging Yun Ni into "stand-in" doubts, and this contractual marriage faces a test of trust.