Twelve years ago, three girls disappeared mysteriously from a textile factory on the outskirts of the city. There were no bodies, no evidence, and no clues. The case was eventually concluded as a voluntary loss of contact, the files were sealed, and the truth was buried. Physical evidence identification assistant Su Wan has been trapped in obsession since then. For twelve years, she has been digging for clues just to find her best friend who disappeared inexplicably.
Eight years ago, a mysterious gray case suddenly came to an end. The partner of police officer Shen Yan of the crime team died mysteriously in the line of duty. The suspicion was forcibly suppressed and the truth was artificially sealed. Having been punished and left the police force, she turned into a lone cold case pursuer, dormant with paranoia, and vowed to tear apart the darkness covered up by the layers.
A mysterious anonymous courier, a rusty brass button, and two incomplete dust-covered files brought two scarred women together. Su Wan is good at microscopic physical evidence, gentle but sharp; Shen Yan is good at criminal investigation deductions, cold and extremely stubborn. The two went from having conflicting ideas and testing each other to working side by side to pursue and redeem each other.
As the investigation deepens, two unsolved cases four years apart are completely intertwined. Under the perfect mask of the glamorous philanthropic entrepreneur, there are years of bloody sins hidden. The embers of the old case are not extinguished, and the undercurrent of the abyss is surging. They use physical evidence as a blade and obsession as a light to tear through the lies of silence and let the buried injustice finally echo.
Intention: Evil will never disappear on its own, silence and cover-up are the breeding ground of evil. Ordinary people can also hold on to the glimmer of light to break through the long night, prove the truth with persistence, overcome the scars with perseverance, and fight against the systemic aphasia and injustice coerced by capital, so that the buried weak and injustice can finally be seen