Above the wasteland, the garbage dumps hide the secrets of the old world. Former agent Chen Jin was falsely accused of corruption and became a scavenger, but during a rummage he activated the 'Trillion Mall' - a mysterious system that can exchange scraps for any item. Every product in the mall corresponds to pieces of evidence from that old case. He thought this was an opportunity to turn around, but he didn't know that he had already been targeted. Bai Zhi, a scavenger who calls himself "Trash Doctor", suddenly breaks into his life. She knows about his past, but she hides a deeper secret. Lai Lai has a list of people involved in the case, Tie Mian is secretly looking for evidence, Aunt Su's copy of the file, the chip picked up by Xiao Qi... All clues point to a huge underground group. Chen Jin must survive in the wasteland while using the mall system to piece together the truth. But every exchange will expose his identity. When the chain of evidence gradually became complete, he discovered that the real mastermind behind the scenes was actually the person he trusted the most. Old scores must be settled, but the price may be the destruction of the entire wasteland.
