Ming and his wife Jen lead quiet ordinary lives with their 13 years old daughter Lucy, while their 20 years old son Sunny is at medical school overseas. Things seem perfect until Lucy's behavior turns bizarre from her fourteenth birthday. As Jen and Sunny struggle to decipher the cause of it all, Lucy's increasingly disturbing behavior escalates into violence. Dark and hidden secrets are unveiled one by one and the family is forced to confront their past, that deep down, they have never truly been able to forget or forgive themselves for.