medallion, biological weapon, shanghai, china, riddle, ex-lover, greece, kazakhstan, mercenary, earthquake, chinese mafia, treasure hunt, alexander the great, pandora's box, kenya, scuba diving, female protagonist, hong kong, mi6, scientist, underwater, heiress, archaeologist, based on video game, aristocrat, antidote, great wall of china, crime syndicate, bio terrorism, mythical artifact, weapons training, archaeology,