High-IQ Crime: The Uncovered Evidence

Engineer Su Heng lost his sister, Su Qing, after four people conspired to frame her and she had no way to appeal. Using his knowledge of structural engineering, he carefully devised four deaths disguised as accidents or suicides, completing his revenge. Detective Zhang Cheng gradually zeroed in on Su Heng through his keen instincts and saw through every trick, but he never had enough physical evidence to convict him. A battle of wits with no winners quietly unfolds across the city.