A woman impressed by news reports about flying saucers, gets hit on the head by a vase, passes out and dreams that she is the 'Queen of Mars', from where she sends an expedition to Earth in order to bring back Rio's Carnaval to the planet.
While her new husband is away looking for work, the wife loses the child she was expecting and uses another woman's baby as a substitute so she won't have to upset her spouse when he returns.
Since the capable landlady Maria bears a striking resemblance to the ruler of a miniature state, she is tasked with playing the role of princess during her absence.
A man embezzles some money in order to pay his debts and the daughter of his boss, who is in love with his son, asks a rich former suitor of hers for help.