The prodigal Lu Fan, after enjoying 18 years of a mega-rich life, returns to his hometown and unexpectedly sees a girl who looks strikingly like his ex-girlfriend. He then learns that the 'white moonlight' ex-girlfriend he hurt back then had, after leaving him, given birth to a pair of fraternal twins on her own. And over these years, she has endured great hardships living alone, and the two children have also lacked a father's companionship. Deeply guilt-ridden, Lu Fan decides to make it up to the mother and her two children. “Yixia, you know that I truly love you. If I'm lying to you, then I'm a dog!”