 Gadget receives an assignment. It tells him to go to The Netherlands (Holland). Gadget has to investigate a diamond smuggling system. Meanwhile, Dr. claw, who is in charge of the diamond smuggling system is also running a secret chocolate factory. Claw is planning to smuggle pieces of diamonds by putting them into chocolates. In fact he is also planning to cut up the symbol of The Netherlands, The Amster Diamond. Gadget must stop Claw from smuggling The Amster Diamond out of The Netherlands