The story takes place in a ravine in Southwest Yazhou. The construction of the third line began in the late 1960s and the relocation of the third line in the 1990s.
In the vicissitudes of history for thirty years, the life experiences between the male and female protagonists are awkward but full of longing. The ideals, sentiments and pursuits of the younger generation. Processes and prospects for change in cities, factories and rural areas.