Libby, Malcolm, and Roopa, the kids from I Get a Clue, are back! Edinburgh's young sleuths are up to their eyeballs in a new mystery/adventure. Libby and Malcolm are on Mr. MacLeod's catering crew for an event at Lintwhite, Lord Blackford's country manor house. The job is going well until Libby trips, spilling a tray of desserts on a guest. Minutes later, it is discovered that a valuable antique has been stolen from Lord Blackford's collection. His Lordship suspects the catering crew of being involved. He particularly suspects Libby. The police come and question everyone, but arrest no one. Back at Gran's, Libby hopes the whole unhappy incident is behind her. She soon discovers, however, that she is involved and more than she could ever imagine.