音樂騷動靈魂，黑白琴鍵起伏流動，指尖不經意敲響消逝的感情。個性奔放不羈的妹妹韻靈從外國修畢音樂學位回港，為患上認知障礙症的爸爸進行音樂治療。姊姊樂敏處事謹慎，一直肩負照顧父親的責任，是家中的支柱。當韻靈奏起爸爸從前教授她的輕快鋼琴曲，在記憶與遺忘之間，爸爸的思緒湧現微妙變化。兩姊妹早已心存芥蒂，隨着回首不堪的家庭往事，彼此的不信任與忌恨演化成激烈矛盾，縈繞腦海的琴音可會帶來救贖？羅家英、楊淇與梁雍婷難得演技爆發，一屋三人合奏出別樣火花。

為了幫助患有認知障礙的年邁父親，妹妹嘗試使用音樂治療，卻招來行事謹慎的姊姊反對。隨著治療進行，父親竟誤將妹妹錯認為過往情婦，終讓姊妹兩人不得不面對從未解的家庭心結。故事以溫柔音樂輕撫家庭傷痕，資深演員羅家英細膩自在詮釋罹病父親，真摯動人。

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? A moving family drama by celebrated actors LAW Kar-ying, Kate YEUNG and Rachel LEUNG.