In France, today in a fictional place.
A gangster - Jose Fabri - is wanted by the police.
Rose, pharmacist, wants to employ a old maid to take care of her house
She writes an advertisement in the local newspaper.
In his hotel room, Jose reads Rose's ad.
He imagines to look like a grandmother to escape from the police chief Popol
In fact, the police will never run after an housemaid grandmother, cooking in a mansion,
surrounded by two young and lovely girls...