Like a disturbed beehive, a small seaside town is buzzing. Just kidding, unknown attackers entered a heavily guarded bay and blew up a top-secret submarine! Diana, Roger, Barney and Snubby are convinced that one of the two suspicious types they have been eyeing for a long time was involved. But who is connected with the criminals? Strange, unsociable magician? Or a professor who for some reason pretends to be deaf, although in reality he greedily catches every word? “There’s no point in guessing, we need to look for evidence!” - the friends say to themselves and get down to business. As soon as night falls on the city.