The United States. Today. A freight train crosses the landscape like a giant steel snake. One day, Ivy, Karen and Christina left everything behind to defy danger and cross the country on board freight trains. They wait for them, hiding in the bushes, sleeping under highway bridges. Amid the grinding and screeching of the metal beast, the director becomes these women's traveling companion. On rail, or wherever their lives lead them, their trajectories cross and echo each other: a desire to live, a spiritual quest, eternal rebellion. They are stronger than society; they are stronger than men; they are free.