Yu Zhaozhao, junior sister of the Xuanxiao Sect, was born with an “ill-luck spirit body.” Everyone near her has bad luck, except her senior brother Xie Linshuang, whom she can’t affect. She acts like a spoiled sweetheart, but she’s actually a scheming drama queen, winning the whole sect’s affection by playing innocent. Little does she know that Xie Linshuang has cultivated the Heartless Dao for three hundred years, yet has secretly treasured the ugly purse she gave him all along. When Yu Zhaozhao accidentally eats a Love Gu pill and must hear her senior brother’s sweet nothings every day to stay alive, the aloof beauty is forced to switch to a whole collection of corny pickup lines, while the entire sect watches him die of embarrassment. But as the two grow closer, Yu Zhaozhao discovers that her so-called “ill luck” is actually an ancient auspicious blessing, and that Xie Linshuang is about to suffer the backlash of defying fate... From “senior brother babysits junior sister” to “junior sister protects her husband,” their sweet journey of growing together gradually reveals a destiny bound across three hundred years.