Despite the drought, 11 year old Clara Beth Patterson (CB for short) is glad to hear that her 15 year old cousin, Fredrick (mercifully known as Scrub) is coming to Tadley Ridge for a visit. But, just as he is getting used to life on the Ridge, their summer fun is threatened by mysterious events in town and the appearance of two strangers with a guaranteed Rain Machine. With the help of their wacky friends from the TRCMSHSSS class, will CB and Scrub be able to solve the mystery, catch the bad guys, and save the town? Possibly... But not until they survive a few scrapes, cause their fair share...