Is sióg óg í Luisne atá ina cónaí faoi Lios Lurgain i nDomhan na Sí. Agus í ag foghlaim faoi shaol na sí agus faoi dhomhan na ndaoine, tarlaíonn go leor eachtraí di féin agus dá cairde. Tá cuireadh faighte ag Luisne agus Deirdre an Nollaig a chaitheamh i measc na nDaoine sa Domhan Thuas. ‘Ná bainigí úsáid as na Cleasa Sí anseo,’ arsa Aintín Gormlaith leo.

‘Ní mian linn aird a tharraingt orainn féin!’ Ach nuair a thosaíonn cailíní na comharsan ag tromaíocht ar an mbeirt, bíonn an- fhonn orthu ceacht a mhúineadh dóibh! Luisne is a young fairy who lives in the fairy fort of Lios Lurgain in the World of the Sí.

As she learns about the World of the Sí and the World of People, she has many adventures with her friends. Luisne and Deirdre have been invited by their Aunt Gormlaith to spend Christmas in the ‘World Above’ amongst the People. ‘Please don’t use your Fairy Tricks here,’ Gormalith warned them.

‘We musn’t attract attention to ourselves. But when the neighbour’s girls begin to bully the two fairies, they find it very hard not to teach them a good lesson!