Trace.

The major case squad within the public security organization tackles a series of perplexing cases, led by forensic expert Liao Yan and criminal psychology specialist Liang Maiqi. Both are young professionals returning from abroad, leveraging their expertise to solve unusual cases. Through close collaboration with their teammates, they navigate dangerous situations, using their intelligence and bravery to resolve crises and complete missions. Meanwhile, other young officers in the squad also develop friendships and grow personally through their involvement in solving these intriguing mysteries.