Shen Lang, an unlucky delivery boy, accidentally inherited his grandfather's "yin and yang" identity and was forced to deliver food to ghosts through a mobile app.
From then on, he delivered food to the human world during the day and delivered orders to the underworld at night. In each of the thrilling deliveries, he revealed the shocking secret of his bloodline, and staged a ridiculous and touching story of "humans and ghosts living together" with an ancient ghost lady who was chasing him.
