Sixth grader Peter is pretty much the average kid: he likes gaming, hanging with his friends, and his beloved pair of Air Jordans. But when he has to give up his most prized possession -- his bedroom -- when his recently widowed grandfather moves in with Peter's family, he's unwilling to let such an injustice stand. Peter devises a series of increasingly elaborate pranks to drive out the interloper, but Grandpa Ed won't go without a fight.

Takes you back to when four teenage sleuths, plus one dog detective, first met. Unjustly accused of staging a spooky practical joke complete with ghosts, the kids are suspended from Coolsville High School. To clear their names, they team up to solve the supernatural mystery.

Trina and Dan love their Dad's collection of ventriloquist dummies, except for the creepy new dummy. That one has a card containing a magic spell in its pocket. The two get pretty upset when their visiting cousin, Zane, uses the dummies in his pranks. But one night, when their parents are out, spooky things start to happen, things that only the dummies can be doing.