第四季中，Eve、Villanelle和Carolyn处于非常不同的境地。两人在桥上交心之后，Eve踏上了复仇之路，Villanelle找到了一个全新团体，试图证明自己不是一个“怪物”。而Carolyn在解决叛徒Paul后，继续不遗余力地追查「十二门徒」和下令杀死Kenny的那个人。

一座冰下火山爆發。一年過後，融冰釋放出史前時期的神秘元素，引發了無法意料的後果。

In a remote town in Iceland, Police desperately try to solve a crime as a powerful storm descends upon the town.

Outside Parliament in Reykjavik, a man throws himself at the Minister for Industry, setting fire to them both. He dies, but she survives. Andri Olafss