Overt and Covert Detectives

He was a famous grassroots detective in the Republic of China. She was the first female detective in the Republic of China. The showdown between open detectives and undercover detectives, the duel between water and fire, the collision between Western reasoning and Chinese puzzle solving. The two are tit-for-tat, but secretly fall in love with each other, and invisibly walk hand in hand to the deepest part of the abyss!