On the wedding night, before they had even drank the wine, when Prince Li Beichen's dagger was pressed against Shen Qianhe's throat, her soul-breaking nail had already penetrated into the back of his neck. Two drops of blood fell into the wine, as red as the last candlelight when the Shen family was wiped out that year.
The world only sees the Crown Princess as gentle and upright, but no one knows that there are nine hidden ropes wrapped around her phoenix robe, each leading to the truth on the first floor of the pagoda. She married him just for revenge. He married her, so it was not a counterattack. After being married for seven years, they teamed up to kill seventeen enemies of the court and put down three rebellions - but after taking off their court clothes and returning to the East Palace, she drank poisonous wine from him and he fed her arsenic. They poisoned each other seventeen times, each time putting the antidote under each other's pillow late at night. She didn't know that he had blocked three assassinations for her, and he didn't know that he had redirected every dose of poison she took.
Until he fell into a pool of blood on the top of the tower with seven stabs in his body, and put half of the soldier talisman into her palm: "Take it, the country is yours." Shen Qianhe cut his wrist and lit a lamp - under the lamp was a blood letter written by him when he was seven years old: "I saved the youngest son of the Shen family, I hope he will grow up and don't hate him."
Three years later, the pagoda was rebuilt and a lotus pond surrounded the steps. Li Beichen returned from the border and pretended to die. When he opened the door on the ninth floor, he saw prescriptions all over the place like snow, all signed with his name.
The tower locks the lotus heart with nine layers of embers, which will last forever. The poison and the antidote lay in one place, finally being cooked into the same recipe over time.