Twenty-seven-year-old Su Yu received a notebook recording seventy moments of growth at her father's funeral. When the "Echoes of Yesterday" system was activated, she was given seventy opportunities to go back to the past.
The rules are cruel but gentle: she cannot change the established facts, she can only stay on each specific date for 24 hours to "continue" new memories for those regretful moments. From toddlerhood at the age of one to rebellious youth, she tried to embrace her inarticulate father in the gaps of time.
This is a healing story about family love, regret and forgiveness. If time has an echo, it must be in the shape of love. The echo of the seventy days was the seventieth reunion between her and her father across life and death.