In modern cities, there are endless mysterious cases - silent disappearances, unsolved murders, business disputes and undercurrents of internal strife in the police force. Song Yan led the criminal investigation team and teamed up with forensic doctor Qiao Yuqiu and reporter Pei Che to trace the truth and uncover a shady case that spanned ten years and involved power, money and redemption. The story integrates the two-pronged advancement of the police force and the media, technology and human nature, with multiple perspectives intertwined. The main cases progress layer by layer, and daily small cases also reflect the moral dilemmas of real society. Each volume has an "independent sub-case", and the final clue leads to a shocking case involving power groups and the fate of individuals. Character growth, emotional entanglements and wavering of faith are intertwined, and the choice between truth and responsibility runs throughout until the ending - there is only a thin line between darkness and light.
