Pa's wish is to learn how to grow the kind of roses that her neighbour, factory owner Záhorský has cultivated.

Eva applies for a job as a secretary in order to steal the instructions for growing the roses.

Eva in turn falls in love with the Záhorskýs' secretary, Jiří Kučera, who has nestled his way into the family in order to win back his stolen family jewels.

When Eva brings the instructions for growing the roses to her aunt, she finds out that she already got them a week earlier from Záhorský's daughter Eliška, and Eva returns the instructions.

In the end everything turns out well, the Záhorskýs become friends with aunt Pa and offer her the rose growing instructions themselves, Jiří's family jewels are returned, Michal is engaged to Eliška and Eva gets together with Jiří.