Mai Lee and Oberlin St. Clair are on their way to the Tibetan capital city of Lhasa with the mysterious briefcase they stole from the Blackdoor Group. But Whitt Roberts has secretly boarded the train…and he wants his briefcase back. At the same time, Seinshun and Nathaniel have landed in Tibet and are racing to find clues as to the whereabouts of Macallan Orsel.

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