At the scene of the heavy rain murder, detective Lin Yuan remembered the skinny girl Jiang Jianxia who was protecting her younger brother. Reunited five years later, Jiang Jianxia, who dropped out of school to support her family, works in the nightclub driving/funeral makeup industry. Her hyperamnesic brain can reproduce the birthmarks and accents of each suspect. She sells her memories in exchange for her brother's medical expenses, but she always "happens" to appear when Lin Yu'an is investigating the case - the cigarette on her fingertips burns clues to the old case, and the tear mole at the end of her eye hides the gang's secret language. When the Qinglong Gang's shooting case restarts, they confront each other in the attic of the red light district: the blood-stained delivery helmet collides with their father's relics, revealing a shocking truth. This time they want to redeem the dignity of women that has been crushed by the times.
Concept: In the rusty gears of time, the sharpest thing is not the bullet but the tampered memory. Only by breaking through the thorns of class and lies can the rose of two-way redemption be cut out from the rotten fate.