Courier Song Xingye once delivered the wrong package and became a "customer" specialist in the underworld. On the way, they met the poisonous psychic Zuo Xiaoman and the funny live broadcaster Fatty Lin. The three of them were involved in a series of bizarre commissions - with laughter and tears, and dangers everywhere. They not only want to make money but also fight against the "spiritual black market", sometimes cooperating and sometimes fighting with the mysterious ghost Li Wuxin. As the truth was revealed, everyone not only solved many supernatural mysteries, but also gained friendship growth and life redemption. In the end, they challenge the rules of the underworld and change the balance between the human and ghost worlds.
