Philippe Lambert, an attractive young attaché to the Prime Minister's office, is a man of many female conquests. One of them, Madame Grandbourg, wife of a very influential man, sent him a passionate letter, which he lost at the theater. Marion, the usherette who found it, contacts him to ask him for a "favor" in exchange for its return: to avoid eviction from the family apartment, because of the father, who gardens in every room and constantly floods the downstairs neighbors. At first, Lambert r...