The marriage between Wei Hu and Bai Xiaoru is romantic, sweet, prosperous, and warm. Being able to marry someone who is gentle, handsome, and meticulous, in the words of Bai Xiaoru's happiness, has exhausted a lifetime of good luck. But on Wei Hu's thirtieth birthdayTian, the appearance of a mysterious woman shattered the harmonious and happy life of Bai Xiaoru and Wei Hu. Bai Xiaoru noticed that Wei Hu was undergoing subtle changes. Who is that woman? What is her relationship with Wei Hu on earth? Becoming a White LittleThe thorn in Ru's heart, but afraid of losing it, dared not reveal it to her beloved husband. Suspicion was constantly tormenting her. At the suggestion of her best friend Xiaomei, Bai Xiaoru began secretly investigating Wei Hu and the mysterious manWhen Bai Xiaoru finally found out that the mysterious woman was actually the biological sister of Wei Hu, who was known as the 'only child', she gradually fell into the cruel 'black hole' in her husband's heartPeople are becoming increasingly unfamiliar, and hidden secrets and sins are gradually emerging, beginning to devour this seemingly perfect marriage