A young unemployed man gets a job as a private secretary by chance. A good salary, a first-class apartment - but things are not going right in his new residence. Notes warn him, a beautiful woman appears in the mirror, valuable documents disappear from the tightly locked safe.

Luise Fleck's first credited work as a co-director.

In New York, boxer Eddie Steele has a promising career ahead of him. But this makes him reckless, and he prefers nightclubs to training. Eventually, his reckless lifestyle becomes his downfall. After some reflection, he emigrates to Germany, opens a sports school in Berlin, and allows his favorite student to benefit from his own experience.

The two stars of an upcoming operetta performance quarrel constantly. but they also fall in love with each other.