许佳佳继承父志，加入社会安全支队，和队员们一起维护社会治安。
When Joni was 14, her best friend Gracie Darling disappeared during a séance. Some 27 years on, the local kids in a small town get their kicks with a game of ‘Playing Gracie Darling’ – but the seemingly innocent game turns sinister when another girl disappears. Joni, by then a child psychologist, returns to the town and partners with a police sergeant Jay to uncover the truth, while Gracie’s sister Ruth faces a mother’s worst nightmare when her own daughter vanishes under hauntingly similar circumstances.
受人尊敬的正义法官秦誉（张家辉 饰），为掩盖儿子交通肇事逃逸真相，不惜将自己拖入罪恶深渊，在法官职责与父亲身份间陷入两难，高级督察唐萱（胡杏儿 饰）在调查中发现端倪，逐步揭开案件背后隐藏的父爱牺牲与程序正义的冲突，一场关于父爱与正义的终极博弈就此展开。
