A musical comedy about a date between boy and girl which started badly but continued very unexpectedly...

The film is a concert of well-known actors from an alcohol rehab where a middle-aged man has taken refuge to get rid of his addiction. In the rehab, cruelty is personified by the attendant who, with sadistic satisfaction, hands out demerit points for the slightest sign of displeasure or rebellion.

Milda, a 13-year-old boy, loves to read adventure novels and imagines himself as a musketeer. He spends his summer vacation with his parents in a cottage in the Jizera Mountains, where he meets new friends and faces various challenges.