In a small Italian town, we meet a free-spirited young man who lives life on his own terms, enjoying music and parties. However, his world of pleasures is threatened when his mother, worried about his future, decides to intervene and make him take responsibility. With a touch of humor and a good dose of chaos, his mother presents him with a situation he cannot ignore: he must take care of his little sister, a mischievous and energetic girl, after the death of their father.
At first, our protagonist feels overwhelmed by the responsibility. Taking care of her not only involves looking after her but also integrating her into his social life and, of course, into his world of boys and rock music. As he tries to deal with his sister's antics, he discovers that being a parent is not as straightforward as he thought. He will have to learn to balance his own desire for fun with the need to care for and guide the little girl in an unpredictable environment.
The film is a comedy full of heartwarming moments and hilarious situations that explore the sibling relationship and the unexpected journey of fatherhood. With a soundtrack that evokes 1970s Italy and charming performances, the story culminates in a sweet message about personal growth and the importance of family, all while facing the adventure of being a "de facto dad."