Faced with a series of complicated and suspenseful cases, how will the trio of senior chemist Yu Xing Bai, senior inspector Jing Hao Ran of the serious crime unit, and senior doctor Fan Pei Qing unravel the mystery step by step, and use science to reveal the facts and find the truth in the midst of dangers? When facing life and death, how will they stick to their original intentions and complete the redemption of themselves and others?