In the Southern Song Dynasty, judicial officer Song Ci finds himself unexpectedly allied with theater performers Zhao Zhiting, Wang Ling, and dancer He Wenning. Despite their contrasting backgrounds, the four form an unlikely team, using keen investigation and forensic skills to solve four intricate murder cases. Together, they bring justice to the dead and fairness to the living, each case strengthening their bond and dedication to the truth.

讲述了在南宋时期，提刑官宋慈外出巡查遇险时，阴差阳错结识了南戏艺人赵知亭、王陵以及舞姬何温凝。身份不同的四人几经磨合、通力合作，通过推理问询及验尸等手段，连破四件凶案，为死者平冤，还生者公道的故事。