Su Lingxi has three things to do when she wants to succumb to demons: no credit, no bargaining, and no after-sales service. The rat demon in Bianjing was causing trouble, so she held the soul-locking bell and negotiated for fifty taels of silver. While bargaining, his apprentice Ah Fu pasted the demon-repelling talisman as a window grille to attract wealth, which almost made the rat demon laugh out loud. Just after collecting the demons, I bumped into Shen Qingci, the Minister of Household Affairs who was investigating the case. The man is as gentle as jade, but he thinks she smells like copper. Su Lingxi took out the abacus with her backhand and said: "Your Majesty, Sir, I will pay 30% for your courage. Do you want to pay now or on credit?" She didn't realize that the tip of Shen Qingci's middle finger trembled slightly - the way she shook the bell was very similar to the enemy in his dream who had been threatening his life for hundreds of years...