Deep in the bustling but hidden city, five young people with different abilities and pasts gathered together to form a folk suspense reasoning team. They work together to solve a series of bizarre cases: from seemingly unsolvable serial murders, to disappearances that appear simple at first but are actually complicated, to major cases that point to the dark side of the social system. Every time a case is solved, not only the truth behind the crime is revealed, but also the members continue to face their own trauma and shadow. The trust, conflicts and growth between the team are sublimated time and time again in the test of life and death, and on the edge of interest and justice. And behind the layers of cases, a black storm starting from Lin Yuan's unsolved old cases will eventually sweep everyone away. When the real mastermind emerges, everyone must make their own choice...
