Retired soldier Chen Han returned to his hometown for a blind date but failed to get it, but he mistakenly accepted a mysterious offer and became a temporary worker at the "Underworld Office on Earth". His new job is to use the mobile app "Ghost Tong" to take orders and help various ghosts fulfill their last wishes to earn merit and exchange them for conveniences in the world. Until he met the most special "client" - his ex-girlfriend Lin Xi who he thought had been sacrificed for five years. She appears as a living soul, and her poisonous tongue remains the same, but she hides a shocking secret that her body is still alive and her memory is locked. When the Western Death forces invaded the underworld system, causing chaos in the Yin and Yang order, the pair of "former CPs" were forced to form a temporary team with the talkative Black and White and the milk tea shop Meng Po. Chen Han has martial arts with his left hand and black technology with his right hand. He drives goods during the day and delivers "ghost" express delivery at night. However, his ultimate mission is to take back his girlfriend's body from a transnational conspiracy and sign a permanent term for this "temporary worker" contract.
