香港罕有音樂爲主軸的電影，所有演員均是真正的音樂人。

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Cat(謝安琪 飾)自小崇拜彈結他的父親家勁(泰迪羅賓 飾)，家勁卻在她十歲時離家出走，自始消失人間。多年後，二人在火葬場內重逢，此時，Cat身邊多了一個九歲兒子Riley，家勁身邊多了一位少女樂弦，四人忽然同一屋簷下，一個家四種聲音，互有過去、秘密與恐懼。當曾支離破碎的家庭成員，開始放下芥蒂互相扶持時，卻因為Cat的遺傳病將面臨更大難關。

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A rare music-focused Hong Kong Movie. All of the cast are musicians in their real lives.

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Since young, Cat (starring Kay TSE) has admired her father King (starring Teddy Robin), who left home when she was ten and never being connected. 
Years later, they meet again in a crematorium, where Cat is with her nine years old son Riley (starring Rondi CHAN). While King is with Cat’s half-blooded sister Lok Yin (starring Anna hisbbuR). After an interim decision, the four of them are living together. 
This new family with four different voices, each with their past lifes, secrets, and fears. As the once-broken family members begin to set aside their differences and support each other, they will face even greater hardships with Cat's genetic disease.