Angelic

After an exorcism gone wrong Angelica's twin sister Beatriz ends up being the one possessed and gets locked up in solitary in the mental ward as a precautionary. After many failed attempts Sister Lilliana persuades to get Beatriz exorcised by an Angel and as Angelica and her step sister Amaya look for an angel who'll actually agree to exorcise her sister Beatriz is left in the hands of a demon who plans on taking over the mental ward and wants to use Beatriz's body as a meat sack to finish the job.
But Beatriz discovers that that isn't the case, that the demon's intention is something more that ruining lives, but letting out the dirty secrets that have been bottled up in the hospital.