In the summer of their twenties, Chloé, Bastien, and Camille, three inseparable friends, decide to travel across Europe by train using the legendary Interrail pass. Each stop becomes an initiatory stage where stories of love, friendship, doubt, and self-discovery intertwine. Through landscapes, impromptu parties, unexpected challenges, and intimate confrontations, Interrail paints a portrait of a generation eager for freedom and meaning. A celebration of travel as a rite of passage into adulthood, fueled by the freshness of first departures.