(Focusing on youth suspense) In the fictional coastal metropolis of Yunchuan City, inside the body of 8-year-old boy Lin Mo hides the soul of the deceased top civilian investigation expert Lu Chen. Older brother Lin Zheng works at the civilian organization Mingjian Investigation Agency. An old bronze pocket watch engraved with secret characters guides him toward a sealed past case from twenty years ago involving the embezzlement of intertwined lotus cultural relics. Using the identity of a child, Lin Mo follows the investigation agency to solve various commissions, step by step approaching the gray interest chain behind Yanchi Group. The truth-seeking beliefs of two generations intertwine, vowing to uncover the truth buried for many years.