本剧围绕15年前震惊全日本、却突然销声匿迹的连环杀人犯“蝙蝠”展开的作品。此人神出鬼没，受害者之间毫无关联，且无论运用何种犯罪侧写手法，都无法确定其年龄、性别甚至体格。在所有作案现场，遗体旁都撒有“黑色花瓣”，但凶手的真实身份和作案动机始终不明，案件最终成为悬案。临床心理师安堂枫是“蝙蝠”杀害其父母的受害者遗属之一，她本人也曾被囚禁在黑暗中长达半年。另一方面，她无血缘关系的弟弟奥泽雪路的父亲也被“蝙蝠”所杀，他怀着将凶手绳之以法的强烈愿望，成为一名刑警，奔赴侦查最前线。就在此时，时隔15年，“蝙蝠”的杀人案再次发生。
性格直爽的警长米奇·福克斯是莎伦·莱昂内（《烈焰国度》角色）的继姐妹。她一边在小镇 Edgewater 的街道上巡逻，一边调查犯罪活动，同时还要应付前科累累的父亲和任性的女儿。
在新冠大流行期間，原本在網路上互動親密的凱洛和葛利爾，決定一起生活了！葛利爾直來直往的愛情「攻」勢，讓凱洛有點「受」不了，他希望「親密」關係可以慢慢進展，但隨著葛利爾的前男友出現，二人的生活突然變得混亂，意想不到的困難將降落在二個相愛的靈魂上。
The third season will welcome the West Beverly kids to their senior year of high school. It will be the time of college acceptances and lovers’ rejections. The time of prom dates and promises betrayed. The time of spring break,break-ups, and make-ups. This will all happen in a world of sun and fun,palm trees, and warm sea breezes,success, and excess. From the very beginning of the school year, the lives of the West Beverly group will be shaken up in a way none of them could ever imagine. From this new starting point, their journeys will take them to staggering new heights and terrifying new depths. We’ll see the rise of a pop sensation and fall of a group of friends, the beginning of a new love and the end of a professional dream, the creation of an unlikely family and the demise of another. And that will be just the first week of school. It will be now or never for the students of West Beverly,and they’re not going to waste a moment of time. Expectations will be high,hormones will be raging,and scandals will be hiding around every corner. From the brightest moments of love and happiness to the darkest hours of shame and fear, senior year at West Beverly promises to be an unforgettable journey.
