There are places in this world, which hold a weak barrier to the Spirit realm and the real world. One such place is The Spirit Glade.
After an age of war against the enchanted Fay a dark demi realm of chaos was created, Inhabited by twisted insane denizens with the increasingly rare bastion of sanity, A place to truly frighten an bewilder any unwary adventurer
Serenity Cove is a picturesque coastal town once thriving and prosperous. Now finds that it is in the grips of a terrible evil.
The home of the reclusive Monk-Smiths of Moldan, unparalleled practitioners of the art of smithing.
The forest of HalÃ«fas is a strange place indeed. It has long been inhabited by the forest elves, a race of elves descended from the high elves that have lived for over 9000 years isolated there. This wood is patroled by a groupe of expert rangers who know the forest well, Tred lightly and unthreateningly here for you may find your end in Hathil’S arrow.
There lies a valley, far to the west, on the shores of The Great Northern Sea, that has a mist that is both blessing and curse. All those that breath the mist heal with remarkable speed, so fast that only the mightiest blow or the truest strike can fell the smallest beast. The warriors who settled this land became soilders of great renown, for not only were they impenetrable defenders, they were warriors whose aim and might were unsurpassed.
The Forbidden Jungle has never been explored thouroughly, for the simple reason that many of the explorers are never seen again.
With a huge number of sacrificial victims, another realm long ago secretly bound a Prince of the land spirits, Iorstonn by name, thus ensuring the fertility, and improving the magical defences, of their realm. But binding that Prince to one spot has disrupted the weather and magical patterns (ley lines?) over half the continent. Things have become bad enough that a coalition has been formed to rectify the situation, once divinations have established the cause.
Your party is one of the teams assembled to do the rectification: find the binding object and steal it ("so that we can destroy it here in our realm, of course"...*) or destroy it over there. Presumably the Prince will be grateful to his rescuers and angry at the binders, but with a greater spirit like Iorstonn one can never be sure: such beings are "tricksy".
* Of course, the rulers of our realm might want to control Iorstonn for their own ends...