What is the real goal of Blackmarket Haidong?

One day, the hero Jet Kuaidou learned that his father, Kuroba Touichi, was the black Kuroha, and his father was murdered by a secret organization eight years ago. In order to find out the truth of the organization, he inherited the profession and name of the thief, and turned himself into Heiye Haidong, desperate for his life, trying to draw out the murderer who killed his father. In an action, he learned that his father's enemy, the secret organization, was planning the immortal Pandora in stone of destiny. In order to crush their plot, his goal now is to find Pandora before the organization. So his main prey are things related to gems.