Marcello is a young man who, beneath the clear-cut plans he has for his future and firm visions about the world, is still discovering himself. By his side there is his best friend Gioele, an unalloyed dreamer. For him, time seems to stop underneath the clouds of their childhood, while Marcello is ready to set off to the big city and start his adult life. During their last summer together, the two embark on an excursion to find the mythical "leap's waterfall", a journey that will prove revealing. Throughout the search for the waterfall, the two will discover themselves and each other truths.