Stare Boots, father of Trap Boots, returns from an expedition to Mount Terrason bearing a precious white dragon jewel. Its uncanny resemblance to one possessed by Shiro sparks an investigation by Clay, Pastel, Rumi, and Shiro into potential links between the jewels. The group probes whether Shiro's parents connect to Stare Boots' discovery, driving their quest to uncover the artifacts' origins and significance.