There is no other way out: Cecilia Kass (Elisabeth Moss) finally wants to draw a line and break away from the violent relationship with her control-addicted friend (Oliver Jackson-Cohen). One night she makes the decision to finally go somewhere else. With her sister (Harriet Dyer), her childhood friend James (Aldis Hodge) and his daughter (Storm Reid), she finally goes into hiding, whereupon her ex-boyfriend commits suicide. While Cecilia inherits a significant part of his fortune, the uncanny events in her life that soon lead to the first fatality are piling up. The supposed widow is certain that her ex has only faked his death and is now invisibly chasing everyone she loves – but who will believe her?