Detectives reopen a cold case from 1973 and hunt for a killer in the Port Talbot area of Wales, hoping that 30 years of breakthroughs in forensic science and modern DNA analysis can solve the mystery.

A group of vampires and werewolves, seeking a fresh start, move into a haunted house. The lingering spirits of unsolved deaths test their resolve. Amid their supernatural struggles, their shared longing for becoming a human unites them.