A working class young woman disregards the wishes of her father to stay in her place, and marries higher in society by wooing a wealthy car manufacturer.

Engineer Frank Nor loses his sight in an unfortunate accident. When his superficial fiancée Eliška leaves him, Frank attempts suicide. To prevent him from repeating his attempt, his father hires a young nurse, Milena. The girl takes exemplary care of Frank, literally becoming "the apple of his eye"...

Adam Kavalír returns from abroad to take over the family factory from his father. But as a consequence of his father's bohemian lifestyle the business is so far in debt that the Kavalírs even lose their villa and must find a place to sublet. Mrs. Trojanová is no longer up to managing her pension, the co-owner of which is none other than her peevish daughter Eva, and she is looking for a capable manager. Adam applies for the position and is accepted.