Dandelion

Harold St. James is both a father and husband who adores his loving family and leads a simple life until an elderly man visits him in a dream. The man warns Harold of creatures cominig to kidnap his daughter. Soon enough, these vicious monstrosities arrive and throw Harold's world into madness. In his quest to keep his child safe, Harold joins with a behemoth exterminator and adolescent mental patient with burgeoning mystical powers and the trio help him combat the monsters.
However, as hard as they try, Balor of the one eye still whisks his daughter to the Otherworld to be his child bride.
Ten years later, Harold and the others find a doorway to Annwn, the Otherworld. With the help of the overthrown Tuatha de Dannan, the faeries of the mound, the trio sail to Emhain Ablach to save Harold's teenage daughter and destroy Balor for good.