原本应该是最亲的双生姐妹，却在父母离异之后走上了不同的道路。姐姐变得腹黑冷血，为了达到目的不择手段，而妹妹善良单纯，一直照顾着重病的母亲。金钱与权势的诱惑，一场看似玩笑的婚姻，将几个人的命运紧紧连在了一起。本想是为姐姐做一个简单的替身任务的妹妹，却没有想到，从此之后的生活再无宁日，来自亲人的一次次阴谋与逼迫，最终将她拉进了这个越来越大的阴谋漩涡之中。
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。
BBC续订《毁坏》第二季。
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.
