When the storied Staff of Moses, responsible for summoning the plagues of ancient Egypt, vanishes from the museum in Perilous Falls, Will Wilder is suspect number one. As the river runs with blood, sharp-toothed frogs surround his home, and clouds of swarming gnats choke the streets, Will must rely on his supernatural ability, everything he learned from his training, and help from his friends, siblings, and Great-Aunt Lucille to find the missing staff and unmask the hidden evil before time runs out for all of them.

Maps on endpapers.