With bewilderment and anxiety, the aspiring pop group consisting of Mishka, Valerka and Katya peers into a sophisticated computer, rented for recording musical compositions. And there’s a reason: his hard drives contain conversations of different people on mobile phones! What now, just return the device, issued by a very strange office, most likely by mistake? But here the matter is clearly unclean, which means... `And that means we need to temporarily retrain from musicians into detectives and definitely reveal this secret!' - the guys say to themselves and, for starters, they release a decoy...