This is the story of an extraordinary friendship between two teenagers, Paolo and Piero. Friends are chosen carefully, especially when you have dreams to pursue, because you need partners in crime, someone to share happiness with, because happiness is born a twin. Day by day, the two begin to think about their future and what they want to do when they grow up, clashing with the reality of a small provincial town. Their first jobs, first loves, first serious conversations, and growing up, maybe too fast. The Apprentice of Happiness is real life, a life lived, never wasted.