Leaving music school, the happy-go-lucky Ling returns to Hong Kong to her dementia-stricken father, on whom she tries to conduct music therapy. Her demurer older sister Munn, the caretaker and sole supporter of the family, watches with disapproval. Playing the piano piece her father once taught her, Ling seems to register some change in her father’s condition, a glimmer of hope amidst the abyss of oblivion. However, secret animosity and rivalry eventually leads to open conflict between the two sisters, bringing out long-time family traumas. Will music save them?