A chance encounter with an eccentric Egyptologist, Seán Ó Tuama, takes Tintin and his faithful dog, Báinín, on an adventure in search of the lost tomb of Pharaoh Kí-Oskh. But the king’s resting place contains a secret much darker than mummies and desert sand. By following a strange clue, Tintin and Báinín fall headlong into the clutches of a gang of drug smugglers, as they unwittingly find themselves in vicious conflict with an international criminal.