Immaturi - Il viaggio follows a group of high school friends who haven't seen each other in years, as they decide to take a trip to the Greek island of Paros together. The group consists of six friends, all of whom are now in their early 30s and facing various challenges in their personal and professional lives.
The group includes Luca (Raoul Bova), a successful architect who is struggling with a failed marriage and a distant relationship with his daughter; Paolo (Ricky Memphis), a schoolteacher who is unhappy in his career and still pining for his ex-girlfriend; and Marco (Giuseppe Battiston), a stay-at-home dad who is feeling emasculated and unable to connect with his wife.
As the group spends time together on the beach and in the local bars, they begin to reminisce about their past and reflect on how their lives have turned out. They also confront their current problems and attempt to find solutions, as they support each other through the ups and downs of their trip.
Throughout the movie, the group engages in a series of humorous and sometimes dramatic moments, as they navigate their own personal challenges while also reconnecting with each other. Ultimately, the trip to Paros provides an opportunity for them to come to terms with their past and present, and to move forward with newfound clarity and hope for the future.