Bansi O'Hara is visiting her granny in Ireland, when very strange things start to happen. First there is the swan that seems to be following them from the ferry, then the strange little man who appears in her bedroom and says he's a brownie (a type of hobgoblin) called Pogo. Things get even stranger when Bansi finds out that her birth fulfilled an ancient prophecy from Tir na n'Og, the land of the fairies, and that the wicked Lord of the Dark Sidhe wants to spill her blood on fairy soil. Bansi, Pogo, and Tam, a handsome fairy who can change into animal form, cross through the gate that separates the two worlds to try and make the prophecy come true for the good fairy peoples. But the Dark Lord is waiting for them.

The feisty young heroine is back for a second faerie-fueled romp through Irish myth and magic Bansi O'Hara returns in a fast-paced, funny, and frightening adventure. She could be excused for wanting a quiet life after her series of pulse-racing events, when an ancient prophecy from the land of the faeries nearly made her fail at the hands of their Dark Lord. But back into Tir na n'Og she must go—this time to rescue her mother, who is being held captive as a bride for the Dread Cruach. Helped (and often hindered) by Granny and her bickering pal Nora Mullarkey, can Bansi defeat this most sinister of sprites?