Thistle Briarwood is an elf growing up in the Lands of Minuet with his twin sister Poppy and older brother Kelp. In some ways his life could be described as very similar to that of any earthling teenager growing up on Earth. Then, one inexplicable day, everything changes. His father is arrested and exiled by the Elven and Wizard council for a crime he did not commit and Thistle together with his brother and sister find themselves at Loggerwood School. There they find their lives under attack for what appears to be some odd shaped green stones given to them by their father. They discover that they are the Keepers of the Keys destined to reopen the Gates between the lands of Minuet and Earth, Black Wizards are hunting them and to fulfil their task they must link with the earthling girls and travel through a strange land in search of the High Lord of the Sky. His Eminence Henry Fothrington, leader of the Wizards, and their headmaster commander Bartholomew Breams fight to defend the young elves as does Father Wisby, the wizard guardian of the two earthling girls. Together the children battle to fulfil their quest but the journey is long and dangerous and only the young elve's magic and the earthling's knowledge help them survive.