Cat, a talented musician, and the lead singer of an indie band called 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. A passion that Cat passed onto her son, the nine-year-old Riley who is an incredibly gifted drummer. Through this love and passion for music, the once four strangers put aside the past and finally come together to support each other as a loving family.