Hellboy Animated: Blood and Iron

Summoned by the Bureau for Paranormal Research and Defense, the formidable demon-turned-hero and his team are dispatched to investigate a haunting at an ancient mansion-turned-hotel. The owner intends to renovate the manor and turn it into a posh resort, but eerie occurrences suggest the ghost of Erzsebet Ondrushko, a notorious vampire who bathed in the blood of innocents to retain her youth, haunts the premises. Led by the wise Professor Bruttenholm, Hellboy, along with fire-starter Liz Sherman and aquatic empath Abe Sapien, delve into the shadowy corridors of the estate to uncover its bloody history and stop the spectral phenomena.

During their investigation, the team encounters various supernatural entities, including tortured spirits and mythical creatures, while unearthing the tragic past of Erzsebet. Their research reveals her cruel demise at the hands of a previous Professor Bruttenholm-led B.P.R.D. mission. As Hellboy grapples with the nature of evil and questions the ethical implications of destroying supernatural creatures, the group faces the challenge of confronting Erzsebet's spirit, which has been summoned by an enigmatic figure with a vested interest in reviving her. Their encounter with the vampire serves as the catalyst for a deeper exploration into the dark past and the potentially darker future should they fail to vanquish the evil that resides within the manor.