用偽錄片形式拍攝,講述四位年輕人追夢的故事:事業型又追尋幸福的樂樂 (27歲)、憤世火爆的「炒工王」滴滴仔 (23歲)、只相信網絡世界,一心想成為KOL的Daisy (21歲)、來自內地希望進軍香港電影的阿俊 (28歲)。。故事講述決心踏上國際舞台的Band Four 主音Cat (謝安琪飾)自小崇拜結他手父親King (泰迪羅賓飾),父親卻在她十歲時離家出走。廿多年後,Cat 媽病逝,父女在火葬場內重逢,此時,Cat多了9歲兒子Riley(陳諾霆飾),父親King攜帶了女兒樂弦(Anna hisbbuR 飾)回來。四人忽然同一屋簷下,一個家四種聲音,各有掙扎、秘密與恐懼,難以溝通。音樂是四人唯一的共通點,當透過音樂四人開始合拍互相聆聽時,Band Four 卻面臨更大難關 ⋯⋯。The film shows an obscure episode from the life of a Stalinist criminal - Colonel of the Office of Public Security, Julia Brystiger. Her nickname was "Bloody Luna" because during interrogations she tortured prisoners with extreme cruelty. At the beginning of 1960s she appeared in Laski near Warsaw, in the Institute for the Blind, where the Primate of Poland, Cardinal Stefan Wys...。