Ling Qiyue, the legitimate daughter of the Ling family, mistakenly trusted the prince in her previous life and helped him fight for the throne. However, she was framed as a collaborator on the eve of her ascension to the throne. The whole family was executed and she was given poisoned wine. Before she died, she saw Ling Junming stained the palace walls with blood because he saved her. Reborn with hatred, she returned to the age of fifteen and the eve of her haircut ceremony. At this time, the Ling family had not yet been involved in party strife, and Ling Junming was still dormant as a "sick and weak imperial uncle."
In this life, Ling Qiyue tore up her engagement with the prince and took the initiative to knock on the door of Prince Ling's mansion. Relying on her past life memories, she first resolved the crisis when the Ling family was falsely accused of corruption, and then offered advice to help Ling Junming thwart the Queen Mother's conspiracy to seize power, and stirred up the court situation step by step. Ling Junming was initially wary of this grandniece who "suddenly showed kindness", but after she accurately predicted the crisis several times and blocked poisonous arrows for him, her frozen heart gradually melted.
The two used the names of "uncle and nephew" to cover up the public and secretly joined forces: Ling Qiyue worked around the harem and the aristocratic family to collect evidence of the relatives' crimes; Ling Junming made arrangements in the court to eliminate the prince's gang members. During a certain border war, Ling Qiyue presented a military formation map, and Ling Junming personally defeated the enemy. After returning, he ignored the criticism and asked to marry Ling Qiyue on the grounds of "defending the country". In the end, the two teamed up to overthrow the Queen Mother and the deposed prince, and supported the wise new emperor. Ling Junming shed his disguise and became the powerful regent, favoring Ling Qiyue alone, achieving the ending of "the country is at your side, and the love is in your hand".