The Mysterious Mechanism Tale.Fujita visits his family's village and grandmother's grave after a long absence. He is asked to appear at a public hall "Treasure Appraisal Association", and reluctantly agrees. Although he is presented with number of counterfeit works, he buys a metal sake-serving karakuri crab[b] from the Edo period for 5 million yen. However he worries about the warning of its former owner who said that "Who puts this crab close to him, somehow suffers from the heart"...