The opposition between black and white + identity hiding + ambiguous pull! When the twilight burns away the embers of the day, she is destroying the evidence of the crime, and when the morning light tears apart the scars of the night, he is chasing the afterimages. Under the scabs are hidden the gunshot wounds and kiss marks that the two exchanged when they first met! Alumni by day, deadly opponents in a cat-and-mouse game by night. When the heir to the criminal organization Dark River meets a rising star in the police force, they dance a dangerous tango on the tightrope of lies and truth. They met on an autopsy table filled with the smell of disinfectant. The coffee she accidentally spilled soaked the gunshot wound under his police uniform. The Russian poem in his lesson plan contained her father's final letter. The annotation page of "Crime and Punishment" in the library uses Morse code to agree on drug transactions, and the kiss in the shadow of the bookshelf is mixed with the smell of gunpowder smoke and blood.