At 4:30 in the morning, at the riverside pier, floating corpses were floating in the waves, and strange metal tags fell into fishing gear bags out of thin air. Before Lin Mo could take his breath away from the pressure of a rent increase of 500 yuan, he encountered this terrifying night. The disappearing corpse, the mysterious man in the shadows, the condescending candid photos, and a text message asking for a meeting - see you at the same place tomorrow night at seven o'clock, bring a sign. How come the daily fishing routine of ordinary social animals has become an inescapable puzzle?