The story mainly revolves around the mysterious disappearance of a father and daughter at the elevator entrance of Yuanlongli in 1997, involving an unconventional pair of detectives. He Yuan Hang is halfway through his career change and contemplating the transition in his professional life. Ran Fang Xu, freshly graduated from college, is curious and naive about everything. Faced with their first case in life, the two of them use a yellow-painted jeep and a makeshift excavator for investigation. Little did they expect that as they dig deeper, they would uncover truths that profoundly affect their own lives. (Source: Your Drama Jiejie on Facebook)