The Third-Grade Detectives are looking forward to their field trip to a local art museum, where a priceless 15th-century statue of Joan of Arc is on loan from a Paris museum. But when they arrive, they discover that the statue has been stolen!

The police quickly find the statue--smashed into pieces and thrown in a dumpster. Why would someone steal the statue only to destroy it? It looks like a new case for the Third-Grade Detectives--even if the museum director doesn't seem to want their help.