Lada is a little boy who likes to read fiction and has a great imagination. He figures out that his sister Eva's boyfriend is a vampire, and so he and his brother put him through various tests that, in effect, cause Eva and her boyfriend to break up for real.
| Actor | Role |
|---|---|
 Tomáš HolýLadislav Benda | Ladislav Benda |
| MMiroslav BatíkPetr Benda | Petr Benda |
 Josef Větrovecotec Benda | otec Benda |
 Jiřina Bohdalovámatka Bendová | matka Bendová |
 Dagmar Havlová VeškrnováEva Bendová | Eva Bendová |
 Josef AbrhámTomáš Růžička, přítel Evy | Tomáš Růžička, přítel Evy |