故事发生在位于加利福尼亚州的一座宁静小镇上，居民们都是抬头不见低头见的好友，彼此之间关系十分紧密。一具男孩的尸体像投入平静池塘的石块，种种迹象表明这竟然是一宗精心策划的谋杀案。一想到凶残的杀人犯就生活在自己的身边，小镇上的居民陷入了恐慌，一时间，戒备、猜忌的气氛笼罩了整个小镇。
艾莉（安娜·古恩 Anna Gunn 饰）是镇上的警官，在小镇里辛辛苦苦的工作多年，她即将获得她梦寐以求的升职，可是，这一切在一个名叫埃米特（大卫·田纳特 David Tennant 饰）的警探到来之后化作了泡影，初来乍到的埃米特不仅挤掉了艾莉成为了首席警探，艾莉还必须放成见，成为这位新上任的“老板”的助手。
After a high-profile mission goes sideways, Daniel ‘Hondo’ Harrelson is pulled out of forced retirement to lead a last-chance experimental SWAT unit made up of untested, unpredictable young recruits. Hondo must bridge a generational divide, navigate clash
Anna Pigeon is a former city slicker who became a park ranger after a devastating loss changed the trajectory of her life forever. While Anna tries to outrun her demons, her focus turns to solving crimes that have taken place within national park grounds,
