Inspired by the best-selling 2004 novel by John Ajvide Lindqvist and its 2008 Swedish film adaptation, the series revolves around Mark (Bichir) and his 12-year-old daughter, whose lives were changed forever 10 years earlier when she was turned into a vampire. Locked in at age 12, perhaps forever, Eleanor lives a closed-in life, able to go out only at night, while her father does his best to provide her with the minimal amount of human blood she needs to stay alive.