The song "Alucard" by Gentle Giant tells the story of a person who is experiencing a terrifying and surreal nightmare. The lyrics describe the feeling of being trapped in a dream where evil forces are present, causing fear and panic. The protagonist feels like they are in a state of limbo, neither fully alive nor dead, and they are desperately seeking help to escape the nightmare. The chilling atmosphere created by the instrumental breaks enhances the sense of dread and unease described in the lyrics. Overall, the song captures the feeling of helplessness and terror that can come with experiencing a frightening dream.