A wave of sophisticated robberies is keeping the whole country on tenterhooks. The well-camouflaged "Chameleon Gang" is said to be behind it. Strangely enough, the places and times of the burglaries coincide with the tour schedule of a popular singing duo. Are the musicians behind the crimes? Bob goes along on tour and investigates undercover. But where are Justus and Peter?

A wave of sophisticated robberies is keeping the whole country on tenterhooks. The well-camouflaged "Chameleon Gang" is said to be behind it. Strangely enough, the places and times of the burglaries coincide with the tour schedule of a popular singing duo. Are the musicians behind the crimes? Bob goes along on tour and investigates undercover. But where are Justus and Peter?