这部心理惊悚剧被称作CBS历史上「最吓人」的剧集，「足以让胆小的观众一晚上睡不着觉」。故事描述来自洛杉矶警署威胁管理组（Threat Management Unit）的侦探Beth和Jack调查并处理「跟踪案件」。「跟踪案件」的受害人多为女，一些不怀好意的跟踪者很可能对她们劫财（抢劫案）劫色（害案），甚至对她们造身伤害。在另一些案件中，跟踪者可能刺探受害人的隐私，受害人的行为，进行网络骚扰，或者对受害人产生病态的迷恋。
贝丝因为阿曼达的事寝食难安，她收到雷寄来的百合花更加确认了自己的猜想。雷再次伤及无辜，他绑架了特雷西并将此事告知了贝丝。派瑞的父亲派基恩带走派瑞，归来的雷再次下手杀掉了基恩。贝丝遭到警监卸职，维姬接替了贝丝的职位。雷致电贝丝委婉告知了自己的地址将维姬等人引至了垃圾场，他在杀害派瑞后来到了贝丝家中射杀…
杰克在贝丝家留宿，第二天两人一同起床，杰克衣衫不整让贝丝感到尴尬。伊莎贝尔称自己被前男友跟踪，但前男友却大喊冤枉。贝丝与杰克来小别墅查案，卧室里突然发出奇怪的声音，他们发现这里有个神秘组织。伊莎贝尔被神秘组织的人挟持，亚伯拉罕强迫伊莎贝尔洗礼，关键时刻幸得警察及时赶到。同事都以为贝丝与杰克约会，其实…
派瑞特别照顾雷，这让雷感到很不舒服，雷希望他与派瑞之间是平等的关系。贝丝通过信用卡记录得知派瑞已经回来，她感到十分不安。学校的老师贝克被人暗伤，他怀疑是暗恋他的女学生所为。有人在网上发了詹妮与贝克的不雅视屏，詹妮瞬间被推上风口浪尖。詹妮的母亲有一私生女，但詹妮并不之情，杰克怀疑是私生女陷害詹妮。
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