It's all hands on deck for the harvest as the Weston nut farm prepares for the biggest market of the year.

Jo has to juggle farm duties, netball training and a big school project.

Her team has a big game against their rivals, The Ogres, on Saturday - the same day as the market.

But everything that can go wrong, does go wrong!

The harvesting machine breaks down, and it looks like sabotage.

It's up to Jo and her friends to find out more and crack the case! Can they fix things in time for the market and the big game?