"Yuanlai" is a dating app that claims to allow all lonely hearts to quickly find true love; but who would have thought that it would be the source of countless deadly traps? When journalist Li Wei's sister Chen Xiaoman was found dead by "suicide", the puzzle pieces and a card that said "Meet Again" left at the scene opened the prelude to darkness. She joins hands with Shen Zhe, a cold-blooded detective with a strong sense of justice, and Wu Tao, a genius hacker, to go deep into the backstage of "Yuan Lai" and the dark web forum, and uncover a serial murder conspiracy layer by layer.
Technology and human nature are intertwined, algorithms and desires collide: in the ruins of the subway, abandoned factories and the shadow of the city, the three people are constantly being hunted and tested; is the mysterious ID "Yuyue Maple" the mastermind behind everything, or is it a pawn used by a larger conspiracy?
From the hustle and bustle of the city to the gloomy dark web, from the fog of family love to the grudges of the past, the bloody clues lead Li Wei step by step closer to the truth, and step by step into despair. Can she, in the double trap of technology and law, uncover the true face of the "Yuanlai" murder bureau and seek justice for her sister? When the last card falls, what awaits her may be the ultimate showdown...
