Volume 9 finds the protagonists, Seigi Nakata and Richard Ranasinghe de Vulpian, facing both political and personal upheaval. A sudden declaration of martial law in Sri Lanka forces Seigi to return briefly to Japan, separating him from Richard. However, the separation is short-lived; a cryptic message leads Seigi to Hong Kong to meet with , a recurring character whose motivations remain dangerously ambiguous. Vincent appears to be playing a double game, simultaneously helping Seigi while seemingly working to betray Richard.
In a heartwarming twist, Richard aided an elderly woman in finding a ring her late husband had buried during the Great Depression. Using soil experts and historical maps, the team successfully unearthed the hidden treasure. the case files of jeweler richard vol 9