Annie and Apple are a pair of chatty, restless dwarf hamsters from the animal shelter who are being fostered by eight-year-old Kaita Takano and her family. Kaita can't wait to find forever homes for the inquisitive fur balls, but first she has to find them!
Taking a turn caring for the class pet hamster, Marion is devastated when the hamster goes missing and she receives an anonymous letter in her locker with clues leading to a mysterious scavenger hunt.