Qin Lang, a clerk at the civil affairs registration office, was preparing to propose to his fiancée, Su Wanning. But on Valentine's Day, Su Wanning arrived with her male best friend, Li Zihang, to register their marriage, claiming it was merely a game of Truth or Dare. Upholding professional ethics, Qin Lang completed their registration in accordance with the rules. Afterward, he canceled the wedding banquet, publicly declared himself single again, and exposed the fabricated chat screenshots Su Wanning produced afterward to support her excuse. Faced with betrayal and disputes over property and assets, Qin Lang chose not to get entangled in revenge. Instead, he calmly gathered all the evidence and protected his rights through legal channels. After weathering the storm, he remained true to himself, let go of his painful past, continued to work diligently, and bravely embraced a new life of his own.