en Cuevana 3. The inventor and owner of the company "Neprasklo" (Unbreakable), Ing. Sýkora, wants to launch a revolutionary new product – unbreakable glass. However, his two greedy deputies have other plans – they eliminate Sýkora in the African waterfalls and attempt to sell the company to a foreign corporation. They replace the director with his doppelganger, the unsuspecting and unsuccessful extra Fanda Pažout. However, the villains have no idea that Sýkora is alive and returning.