When the exceptionally observant Maudie manages to solve a playground robbery on her first day, she and fellow classmates Ezra, Ava, and Kyle decide to form The InBESTigators to combat crime.

When Sophie's online shopping parcels are delivered but never received, she hires the Inbestigators to find out where they are.

Kyle loses his cool when he doesn't win a race at the sports carnival, but Maudie thinks there might be more to Kyle's unexpected loss than it seems.

The permission slips for the Grade Five rock climbing excursion go missing, meaning the trip might not happen, and Maudie suspects someone hid them on purpose.

When Maudie's notebook goes missing, Ezra, Ava and Kyle join forces to search for it and get it back to Maudie.

Mrs Maniaci's sprinkler timer is sabotaged ahead of the Garden of the Year competition, so the Inbestigators search for the culprit.