On the dazzling Italian coast, a wealthy American, portrayed by the charismatic Rock Hudson, prepares to spend his holiday in his luxury villa. He has planned a quiet getaway, but upon arrival, he discovers that his property has been transformed into a vibrant and bustling summer retreat. The villa now hosts a group of young people, led by the charming and carefree Sandy, played by Gina Lollobrigida, who is determined to enjoy her life without thinking about the consequences.
As the protagonist tries to restore calm to his home, he finds himself caught up in a series of misunderstandings and romantic entanglements. He is drawn to Sandy, but he also has to deal with the antics of her friends, who seem to have very different ideas about how to spend the summer. To make matters worse, an unexpected twist forces him to confront his own romantic relationship, which is put to the test by the arrival of his girlfriend, who does not want him to immerse himself in the carefree atmosphere of the Mediterranean.
With a basement full of laughter, romances, and a little drama, this story shows us that love and friendship can blossom even in the most unexpected places. In the end, amidst misunderstandings and revelations, everyone learns something about the true meaning of enjoying life to the fullest and the complexities of human relationships. It is a hilarious journey that will surely make those seeking relaxation in the summer wish to be part of this magical adventure.