A police analyst becomes a vampire slayer after his sister became one as he is forced to work with a timid author to hunt down the supernatural.
- Luke Williams (played by Darren Criss) - a police analyst who is a vampire slayer since his sister became a vampire, holding a grudge against them.
- John Crain (played by K. Todd Freeman) - an author who ends up becoming reluctant allies with Luke and discovering the world of the supernatural.
- Kathleen Williams (played by Chloë Grace Moretz) - Luke's sister who is a vampire, trying to control her vampiric urges.
- Detective Jill Saint (played by Phillipa Soo) - a detective who befriends John and looks into the mysterious murders connected to Luke and vampires.
- Jeremiah Joye (played by Colin O'Donoghue) - an extremely powerful and charismatic vampire who owns a nightclub and is directly responsible for numerous deaths.
- [adapt some classic vampires?]
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