Η Κατερίνα δουλεύει σ' έναν ραδιοφωνικό σταθμό. Ένα μεσημέρι γνωρίζει τον Μανώλη. μαζί ρποσπαθούν να βρουν ποιος είναι ο μυστηριώδης Α.Μ. που θέλει να κάνει κακό στη γνωστή τραγουδίστρια Άννα Βαρδή. 

The Greek Easy Readers are short stories that aim at improving the learner’s reading comprehension skills. They are all original detective stories or adventure tales, which may be read by the learner without the need for a dictionary. Each book includes simple definitions in Greek of the more difficult words in the text as well as their English, French, and German equivalent; it also contains reading comprehension exercises and keys as well as certain ideas for classroom activities.