Londoner Ronnie embarks on a journey to India when his mother, Suleka, goes missing and mysteriously ends up in a Kolkata hospital. Before Ronnie can unravel the mystery of what brought his mother back to her homeland, Suleka dies in an apparent cult killing. Further deaths point to a series of past murders that stopped 28 years ago when Suleka left India with her infant son. Until now.　　As the darkness within Ronnie grows and the murders reach their peak, all roads lead to the feared witch of Kolkata's insane asylum.

警官杰斯特是一个外表严肃态度坚决的人，他的任务是把那些破坏交通秩序和在街道抢劫的人缉拿归案。然而，有一个团伙公然向警官杰斯特提出挑战，处处为难，在公路上肆无忌惮犯罪，于是，一场惊心动魄的猫抓老鼠的游戏拉开序幕……

　　2005 年，舞会后派对原本是一个欢乐的夜晚，但很快却变成了伊菲最可怕的噩梦。她从那晚起就一直背负着一个黑暗的秘密，直到成年，这个秘密仍然困扰着她的日常生活。

一个受到精神创伤的孩子成为了一名纳萨尔派分子，被捕后必须同意成为一名警察刺客。

　　警戒第二季