Stephen Rea and Eleanor Tomlinson star in this gothic fantasy horror. In 1989, Lara (Tomlinson) accompanies her academic father Dr. Hill (Rea) to the Hungarian town of Styria where he is to examine an ancient, remote castle before its demolition. There, she witnesses a car crash and saves a young woman from her would-be attacker. When they take the victim, named Carmilla (Julia Pietrucha), into their care and hide her in the castle the town of Styria begins to go mad with hysteria. Leah begins to suspect Carmilla's presence could in some way be responsible as she digs deeper into her own family history to discover more about the gripping mystery.