Girls have been sleepwalking and then disappearing and then disappearing all over town. After Maya's class visits the museum, she start to think that the disappearances might have something to do with the new mummy exhibit, but the only way she can find out is if she sleepwalks at midnight.
When Jason and his dad have car trouble in the desert, they decide to camp overnight. Before they go to sleep, Jason's dad tells him a creepy story, just for fun. When Jason wakes up, his dad is missing and it seems as though the ghost story is coming true.
Samantha Sam Archer, her friends, and their kindergarten buddies are on a trip to the River City Children's Museum, which has been plagued by vandalism, and it is up to the sixth-graders and their new buddies to figure out who the vandals are and why they are set on closing the museum.
Edward Egg Garrison and his friends are on a field trip to watch the local minor league baseball team, but a theft at the concession stand is delaying the game, so the four sixth-grade detectives decide to investigate.
Sixteen-year-old Kid, who lives on the streets of Brooklyn, loves Felix, a guitarist and junkie who disappears, leaving Kid the prime suspect in an arson investigation, but a year later Scout arrives, giving Kid a second chance to be in a band and find true love.