After failing the college entrance examination, Shen Wanning, a repeat student, returned to the northern part of the Northern Industrial City and lived in the home of his silent father Shen Yue. Before leaving, her mother confessed that she was not her biological child, so she began to inquire about the whereabouts of her childhood brother Shen Chao between a strange old building and a repeat class. She clashed with and got close to her estranged adopted son Zhou Juan, and used her classmates and file clues to get involved in the sealed South Branch Line incident. As old photos, old objects and word-of-mouth echoes piece together the truth, Shen Wanning is also looking for belonging among identity, family ties and choices, facing trauma, and learning to reconcile with the past. During the ten months of re-reading, she walked through the windy, snowy and muddy streets of Beiling, heard the echo of the train, reshaped herself under the pressure of grades, and approached family secrets that had been silent for many years.
Philosophy: Identity, family secrets, traumatic memories, growth and reconciliation