A mystery taking place in old Egypt. Eleven year old Zet and his younger sister Kat are responsible for manning their families' shop while their father is fighting for Egypt and the Pharaoh. Each week their profits dwindle and they fear they won't have enough to support them, their mother and baby brother. When a thief runs through the marketplace, Zet offers to help the police catch the thief and collect the reward money, but he is unknowingly putting them all in the worst peril.