“You were 17 when you met him. You’re 32 when you decide to leave.” Claire takes the train. Three days of solitude, three days to see the state of nature through the windows, to see her inner state, to remember, to hear the stories of the glacier and Switzerland in the small tourist guide earpiece, to feel the enthusiasm return, to close one page and open a new one. “The Glacier Train” is the story of a separation, three days condensed into one hour. It is also an attempt to share this universal experience: Claire tells her story to the passengers she meets during the filming. She shares anecdotes and watches their reactions, challenging them with her candor, encouraging them to share their own unpredictable stories.