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.
Sequel to 77 Heartbreaks, 77 Heartwarmings, sees the return of Charlene Choi as Eva, and Chau Pak-ho as her ex-boyfriend Adam. Although it has been a year since their relationship ended, Adam is still very fond of Eva and hopes to win her back. He comes across an app that teaches him what to do to reignite the passion in Eva. While Adam tries the tips mentioned in the app and gradually bridges the gap between them, Eva meets Thai star Marvel (Mario Maurer), who also vies for Eva’s love.