Prince of the Sommerlings

It is now two thousand years since the Sommer-lings - or faeries in mortal tongue - vanished from Elbion.
Driven from their home by a great evil, they retreated through many secret doors, down into a hidden kingdom: a land so magical, so enchanting, that they sealed the doors shut and guarded them, forbidding any Sommerling to return to Elbion on pain of death, fearing that if the spells break, then the evil would follow them.
But Sommerlings did return to Elbion: strangely drawn to the new mortal realm, creeping curiously through unguarded doors to walk amongst the fields and woods, mostly when night fell. But the greater evil did re-awake and she had a name... Morgalene, a creature so terrible she threatens to destroy not only mortal Elbion but also the hidden realm of faery.
Will the fabled Prince of the Sommerlings, the spirit of nature, rise once more and so save both kingdoms from death and ultimate destruction?