Lucky to our inseparable friends – Fil, Dana and twins Asya and Anya! They are going on a real archaeological expedition to Egypt. The guys are confident that they will be able to find the mysterious tomb they read about in an old papyrus. But it turns out that finding the treasure is only half the battle. Someone is stealing antiquities found by archaeologists directly from the expedition camp. The search for the kidnapper, started by the guys in the Egyptian underground labyrinth, continues after returning home. And... a figurine of an Egyptian cat helps to expose the criminal.