A half-step Grandmaster? The Gu family's daughter-in-law who sweeps their floors sends him flying into a wall with a single palm strike! Acting on her master's orders, Shen Zhao conceals her identity and marries into the Gu family, spending two years sweeping their floors and silently enduring everyone's ridicule. Gu Yanzhou is arrogant and stubborn, yet he watches helplessly as his brother Xu Jiayan and Bai Lan set a trap that costs twelve martial arts schools their underground fighting competition. Shen Zhao secretly intervenes, turns the tables with a recording, and exposes the truth. When Donghai expert Yin Jiu massacres the Gu family at a birthday banquet, she finally stops hiding her abilities and silences everyone with a single palm strike. A divorce agreement, an old wrist guard, and her master's final letter gradually reveal the truth: she is the direct disciple of Gu Qingya, and the very person who carried Gu Yanzhou out of a mass grave two years ago. The two-year agreement has expired, but the debts of love and the debt of her master's kindness have only just been settled.