Schemermeer suffers an epidemic of people falling into a catatonic state. After the trio finds dressings in the hospital, where none is cured, Vega concludes it's the work of a shape-shifting mummy, who must chose victims according to age-related rules and can only be beaten at his own riddle-game. Suspicion first falls on the doctor, who has ideal access, but a terrible undercover mission proves it's not him and the real mummy strikes again.