该剧改编自尾鱼的小说《七根凶简》。上古时期，陨铁包裹外星来物降临凤子岭，带来七个神秘生物。生物可寄生人体，干扰意识，引人作恶。上古大德与其弟子以神木打造七块木简，将异物引入其中，命名“七根心简”，再以陨铁打造凤凰鸾扣将其封印。历代能人志士继承大德遗志，记载封印心简之法，流传后世。百年前，一犬偶然在凤子岭刨出木简，心简再现人间。二十年间，一宗宗离奇凶案接踵而来，木代、罗韧、炎红砂、一万三和曹严华五个平凡而热血的年轻人因缘际会组成“凤凰小分队”，共同踏上收服凶简的冒险征途。
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李真真（苑琼丹 饰）、陈邦妮（伍咏薇 饰）、朱珠（韩君婷 饰）和马小宝（滕丽名 饰 ）是同在培真女子中学念书的同学，毕业之后，她们在机缘巧合之下住进了同一栋大厦。李真真是一名神婆，靠替人看卦算姻缘谋生，虽然在她的指点之下很多人觅得了良缘，可她自己的良缘却迟迟没有现身。 陈邦妮是公关公司的女老板，接触的都是上流社会的名流绅仕，陈邦妮坚信自己能够钓得金龟婿，一举跻身上层，但目前来看，这也仅仅只是空想而已。朱珠虽然有着火辣奔放的外表，但对待感情却意外的保守，每一段恋情中，往往受伤的总是她。马小宝是一名警察，巾帼不让须眉，是怎样的男人才能够驾驭的了她呢？
剧集以疫情大流行后的日本为舞台，讲述了拥有政府否定人权的特殊力量的“Valiant”的存在，描述了拥有不同背景的年轻男女的相遇，在不合理的世界中追求自由的战斗，以及在那里孕育出的爱情。
Chatfah, the youngest sister of the Bupphachinda family, has just received the largest share of her father's inheritance and is about to be married. However, Chatfah falls from the highest floor of a vacation home to her three older sisters' shocked eyes. When her body disappears, her three sisters—Baibua, Chomphu, and Picha—become suspects in her disappearance. The eldest sister Baibua is composed, wise, and has always sacrificed for her family. The second, Chomphu, is a confident model whose boyfriend Chatfah stole and was engaged to. The third, Putpichaya, is a jewellery designer and the closest to Chatfah. The three search for Chatfah while further tragedy befalls them following their youngest sister's disappearance. When no one else can be trusted, the three sisters must try to trust one another. They move back to their childhood mansion to find out who was behind Chatfah's disappearance, which could very well be one of them.
