In a Victorian Ireland of magic, poetry and rebellion, Ida Jameson, an amateur occultist, reaches out for power but captures Laura Armstrong, a modern-day graphic artist, instead. When Ida channels Laura into the body of celebrated beauty and Irish freedom-fighter Maud Gonne, Laura falls in love with the young poet W.B. Yeats. Their love affair entwines with Irish history and weaves through Yeats' poetry - until Ida discovers something she wants more than magic in the subterranean spaces between Laura's time and her own.