Cat, lead singer of indie band Band Four, reunites with her estranged father King following the death of her mother. King only wishes to make amends and reunite his family introducing Cat to her half-sister Lok Yin. After years of no contact, the newly reunited family struggle to form a bond, however, they all soon realise they share a deep passion and love for music and performing.

Adapted from a sensational real-life case in 2013, the intricate story begins when a young man partners with his friend to murder and dismember his parents. Pleading not guilty, the defense attorneys soon turn on each other, as the defendants play the devil and idiot game. Meanwhile, heated debates emerge inside the jury room, where nine jurors grapple with the truth.