Adapted from Shen Lan's novel of the same name, a mystery novel titled "The Abyss" quietly went online, disrupting the long-held tranquility of a conservative town. Many of the plots in the novel bear striking resemblance to unsolved cases from years ago, undisclosed by the police. The passionate and righteous rookie police officer Li Cheng engages in a series of high-intelligence battles with numerous suspects. Ultimately, Li Cheng dispels the mystery and uncovers the truth hidden beneath heartbreaking family ties and friendships... A single thought can lead some to an oasis, while others remain trapped in the abyss.