Twins Elis and Ellen are on their annual summer visit to their Great-Aunt Bella in Wales.

The discovery of an ancient, long lost book containing a cryptic poem sends them on a terrifying adventure to uncover the truth behind the legend of the Green Lady.

Encounters with ghostly apparitions and dark forces put them in mortal danger and leads to a race against time to save Ellen from a gruesome fate.

A gripping, fast moving ghost story which puts a new slant on an established legend.