Each year, more than 100 million Chinese workers make the arduous trek from the nation’s industrial epicenters back to the rural west to visit family for Chinese New Year, a mass journey that filmmaker Lixin Fan describes as the largest human migration on the face of the planet, which incredibly seems like an understatement after glimpsing the dramas that transpire. Last Train Home provides an all-access pass to follow one such family as they attempt to navigate the trip, an undertaking almost Herculean in its difficulty.