In Houseboat, the Italian socialite, Cinzia Zaccardi (played by Sophia Loren), is on the run from her overbearing father, a successful politician who wants her to marry someone she doesn't love. While trying to escape her troubles, she finds herself in the United States and in need of a job. She ends up working as a housekeeper for Tom Winters (played by Cary Grant), a widower with three children who is struggling to balance his career as a lawyer with being a good parent.
At first, Cinzia struggles to adjust to the responsibilities of being a housekeeper and caretaker for the children, who are initially resentful and resistant to her presence. However, over time, she begins to bond with the family and develops a strong connection with the children, especially the youngest daughter, Roberta (played by Mimi Gibson).
Meanwhile, Tom is initially dismissive of Cinzia, seeing her as a flighty and unreliable employee. However, he begins to warm to her charm and wit, and they slowly fall in love despite their differences in social status and cultural background.
The film includes several comedic moments, such as when Cinzia mistakenly believes that Tom is proposing to her, leading to a hilarious miscommunication. There are also several poignant scenes, such as when the family takes a houseboat vacation, where they learn to appreciate each other and bond as a family.
Ultimately, Houseboat is a heartwarming story of two people from different worlds finding love and acceptance in each other, while discovering the power of family and the importance of love and connection.