Mariella Mystery (That's me!) - totally amazing girl detective, aged 9 and a bit. Able to solve the most mysterious mysteries and perplexing problems, even before breakfast. After much a loved dinner lady, Diana Dumpling, vanishes from the school kitchens, Mariella and the Mystery Girls set out to investigate. They must find Diana and save their school dinners - but will they able to get to the bottom of this bizarre disappearance?