Overworked office drone Si Nanzhi dies suddenly and transmigrates, waking up in the Cold Palace to await her death. The System she gets bound to isn't for palace intrigue, but for running errands. Her first order comes from the deposed empress: one bottle of crane-top red poison. She turns around and sends back a packet of bitter mugwort powder to clear heat and soothe inflammation, along with an after-sales service card. She thought she could keep her head down and survive, but then the tyrant suddenly arrives, holding up a bloodstained order: "Someone's paid to have you killed. Does your shop offer a no-questions-asked, seven-day return policy?" Si Nanzhi smiles. "Not only can you return it, I can also help you strike back. Your Majesty, who would you like me to take down?" From then on, she goes from running errands in the Cold Palace to taking on jobs across the Myriad Worlds. Her clients include the deposed empress, the imperial consort, the tyrant, the foremost immortal maiden, the demon sect's money-spending young master, the interstellar empress... and a mysterious man with a 100% bad-review rate. Later, someone asks how she managed it. She says, "I'm just a delivery girl who happened to change the world along the way."
