第三季的故事从“高第街工业品市场”铭牌挂上高第街牌坊开始，街坊们有的早餐店越做越火，有的从事服装生意，有的专卖进口产品，有的开音乐茶室，有的组建乐队，有的赴港探亲……在充满激情的年代，高第街街坊们跟着时代的步伐，每个人都找到自己的新生活。
乔尔·拉撒路（山姆·克拉弗林 饰）的父亲乔纳森·拉撒路博士（比尔·奈伊 饰）自杀身亡，他很快就被卷入了一系列谋杀悬案之中，同时他还在努力揭开父亲之死和25年前妹妹的死亡之谜。
As Leo's replacement Thomas Chamberlain arrives Nikki investigates the murders of Rachel Freedman, shot in the head, and her little autistic son Nathan, who was poisoned. Nikki rejects policewoman Anne Burchett's theory that Rachel killed them both but is perturbed when an impostor, claiming to be Rachel's sister, visits the morgue. At the same time the disfigured corpse of Eva Liron is discovered, killed with the same poison as Nathan. She had been the nanny to French hot shot footballer Isaac Dreyfus and was planning to blackmail him over a sex tape of them both. Jewish Isaac is a controversial figure due to his anti-Muslim sentiments but he denies ant part in the murders. Then another victim, Isaac's agent Mousa, is discovered dead.
本剧讲述了山冈优子（石田光 饰）和义正（甲本雅裕 饰）结婚后生了两个孩子，成为了一家人。4个人长期生活在同一个屋檐下，孩子们都离巢了，虽然觉得“随时都可以4个人聚在一起”，但是一旦离开家就很难再回来。夫妻之间的对话越来越少，和孩子们的关系也越来越疏远。对分离的家人感到寂寞的某一天，优子参加了悬赏应征的“一家人一起去！两天一夜的会津之旅”。虽然有些犹豫，但还是联系了孩子们，没想到他们爽快地答应了。为了让“家族”重新来过，山冈家的“周末旅行”现在开始了。
