Jiang Ningyao, the successor of Qiyao Mountain, descended the mountain carrying three engagement letters, originally intending to cancel the engagements and collect debts, but instead she ran into Pei Yanchuan, the heir of the Pei family who had been trapped in a wheelchair for four years. Healing his legs with silver needles and breaking deadlocks with a wooden sword, she discovered that his illness actually exposed her master's traitor and the hidden pharmaceutical shady operations of the He family. Moving from mutual probing to protecting each other through life and death, the two joined hands to uncover her father's past case and guard the Qiyao heritage. After all three old pacts were annulled, she personally wrote a new marriage letter, taking charge of her own marriage, and this time she chose only him.