'On Australia Day, Harrie and Ben begrudgingly attend a family barbecue at the Jones' house. They look on as three-year-old Ted runs around after his mum and repeatedly drops household items on the ground. His older sister Ella is no better-she dances and prances in her fancy costumes and shows off in front of her visiting grandmother.
'Just as lunch is served, chaos breaks out, and Harrie's mum loses her brand new, expensive diamond bracelet. Harrie is determined to find out what happened to it.
'Was it stolen by one of the guests, or worse, the host? Did Ted pick it up and drop it somewhere in the house? Harrie and Ben put their heads together, gather clues, make a list of suspects and ultimately solve the mystery.' (Publication summary)