Nadia writes down everything that happens at the Marrow Lane allotments. So she's the first to spot it: Mr. Okafor's giant champion pumpkin moved overnight. Not gone, just sitting three plots away in Mrs. Pratt's strawberry bed, plump and shiny with dew. By morning both grown-ups are yelling at each other. Nadia opens her notebook and starts writing.

Nadia decides to study the pumpkin itself. She crouches in the strawberry bed and looks close. There are faint drag marks in the dirt and a single muddy footprint near the leaves. She measures the print with her ruler. It's small. Way too small for a grown-up.

Nadia finds a second print beside the first, even smaller. Two kids, not one. She waits by the shed until Theo and his friend wander in, and one look at her notebook makes them confess everything. They only wanted to surprise Mr. Okafor. Nadia writes 'solved' and smiles.