A Third Piton for the Cat

During a mountaineering training exercise on the Hláska rock, Ivan Kočička, nicknamed Tomcat, discovers the body of a dead man in a cave on the top of the neighbouring rock. The group calls for the police, but the policemen - constable Lebeda and captain Hruška - find only a sleeeping man named Jiří Hromada, an employee of the regional archives, instead of a corpse. Tomcat turns into a laughing stock and his friend Lucie is the only one to believe him. The boy is firmly convinced that Hromada simulated his sleep and lied to the detectives. He thus sets off to the cave for a second time, discovering a glass fragment and a secret exit there. When he gets into some conflict with a gamekeeper called Pazdera, he is almost killed by a falling stone. At the same time, the château Kotov is burgled and it seems to Tomcat that his deduction of all the circumstances leads to the culprits of both the murder and the robbery. Lucie makes him confess this to Hruška but the captain pays no attention to his explanation. Tomcat thus decides to lay a trap for Hromada and his potential accomplices. He writes Hromada a letter, telling him that he knows about the robbery and asking for a share which should be handed over up on Hláska. He needs three mountaineer's hooks in order to get there, but has only two. He is helped out by Jožin. Hromada agrees to the meeting but, climbing up Hláska, when he should back up Tomcat, he intentionally drops the rope. Tomcat is saved by Jožin's third hook. In the ensuing fight with Hromada and the forester Pazdera, Tomcat is helped by his friends, who secretly followed him, and Lucie. The dramatic situation is solved by the arrival of the police who arrest the criminals. Tomcat gains respect from everybody because his deduction proved right.