In the urban city of Jiangcheng, a woman's body was discovered in a flowerbed next to a construction site. The deceased was in her twenties, beautiful and fashionable, yet her death was shrouded in mystery. Criminal Investigation Team Leader Yan Yan was assigned to investigate this unidentified female corpse case. The investigation revealed that the deceased had been robbed of all her money and valuables, making it impossible to determine her identity. After several twists and turns, the officers ruled out Zhang Jun as a suspect and arrested the prime suspect, Liu Simin. However, after Liu Simin confessed, the meticulous Yan Yan discovered further inconsistencies, and the true culprit was finally apprehended.