When she notices some bones missing from a dinosaur skeleton exhibited in the museum, a young girl with a photographic memory tries to discover who has been taking them and why.
Cam's scatterbrained aunt is always losing things, but when Aunt Molly can't find her wallet at the circus, Cam's sure there's a thief under the big top. It looks like the clown is the culprit, but he seems to have disappeared without a trace. Or has he?