The retired Demon King, Luo Mi, has been living under an assumed identity and delivering takeout on her little electric scooter. All she wants is to save enough for a down payment on a small apartment with a balcony. But on her very first day on the job, she runs into Lin Che, the hero who has been hunting her for 300 years! Lin Che draws his sword and roars, "Demon King, today is the day you die!" Luo Mi glances down at her order and replies, "Move aside. This delivery is about to be late." And so, the most untouchable delivery rider in all three realms makes her debut! The Ghost King spills her soup during a battle? His entire army kneels and pays compensation! The Demon King refuses to pay the delivery fee? His throne is smashed in half on the spot! The Jade Emperor casually gives her a one-star review? She storms straight into the Heavenly Court: "Order ending in 9328. Care to explain?"