The story is told through the eyes of Titi, a very young boy who recently lost his mother and was left stranded in the slums of Montmartre. He comes across a little girl who, later, turns to be an East European princess, chased by the killers hired by her own uncle...
Charming Mimi-Trottin is in love with typographer Louis Chausson, nicknamed Godasse. She meets Doudou, actually a Vicomte, estranged with his parents who are rich automobile manufacturers. Godasse abandons Mimi because of his professional ambitions and Doudou rescues her from a suicide. After making peace with his parents, the young man has Mimi hired as a typist at the factory. After winning a race with one of his father's car, he soon wins the heart and the hand of Mimi.
