In the autumn of the 23rd year of the Republic of China, the Suzhou River was covered in fog and rouge. Shen Shijun, the owner of the Shen Family Dyeing Shop, passed away suddenly. What he left behind was not a prosperous family business, but a crumbling building, an astonishing debt, and an old marriage contract that no one knew about. The eldest daughter Shen Yunzhi is a doer who is "not smart enough" in the eyes of her father. Ten years of youth were soaked between dye vats and account books, and the indigo between her fingers was the mark of her dedication to the family. When the creditors came and the Cheng family forced her to marry with a yellowed marriage certificate, she became the silent sacrifice in her father's will and the heaviest bargaining chip on the negotiation table. There was only a handful of cold pearls left in her clenched palms, and the words "A daughter of the Shen family, her life is thinner than paper, and her heart is higher than the sky." The second daughter Shen Wanzhi is the "spiritual energy" protected by her father. She was able to create the stunning "Peacock Blue" in Suzhou Beach, but she couldn't see through the weird colors in the dye vat of people's hearts. Her father's three calls before his death pushed her from the painting pavilion to the eye of the storm. That unique secret color became the only hope to save the family business, and also became a life-threatening charm. What echoed to her at midnight was her father's last riddle: "Be careful about the people in the paintings." Cheng Jingnian, the eldest son of the Cheng family, came out of the rain. Underneath the handsome and gentle appearance, there are precise calculations and irresistible oppression. What he wants is not only the Shen family's secret dyeing skills, but also the complete annexation of this opponent who has been fighting for half a lifetime. The engagement is like a rope, the debt is like a blade, and his soft call of "Sister Wan Zhi" is like a gentle spider thread, entangled and it is difficult to tell the truth from the false. From then on, the two sisters were tied to the dye vat of fate. The rain kept falling. The story has just begun.