On the first day after Jiang Tang returned to China, he broke the sky-high price vase owned by business legend Mu Zhiqing, and fell into his cold and self-sufficient world. Through a contract marriage, she became his "tool" to deal with family disputes, but she didn't know that the ascetic husband she spent time with day and night was the "eldest brother" to whom she had confided her thoughts for seventeen years! While Mu Zhiqing carefully opened her defenses as her husband, he couldn't help but feel jealous of his "doppelgänger". When Jiang Tang gradually suspected through clues that the person around him was the boy in black, an accident suddenly revealed the truth...