Journey Into Rainbow is an adventure balanced for four 10th-11th Level characters. It takes place on Toril in the Pasocada Basin and eventually moves into a little known demiplane known as the Limitless Light.
From Foreign Land to Foreign Plane
To the north and west of Faerûn there lies the distant continent of Anchôromé. It is a land of ancient secrets and remarkable cultures. The people of Anchôromé known as the Azuposi have long benefited from their friendship with fey who see to the continued prosperity of the Azuposi.
Well now it is the fey who need help, and the PCs are the perfect heroes for the job.
What starts as a simple errand becomes a grand adventure that traverses the breadth of the continent, through a beautiful waterfall and into a demiplane of rainbows and radiance. This demiplane is known as the Limitless Light, and it has problems of its own that only the players can fix.
The PCs will need to bargain with a phoenix and a dragon, confront enigmatic creatures of rainbow, and even appease a colossal titan! Worst of all is the Indefinite Churn, a realm where Limbo has spilled in and corrupted the beauty to serve its master, the slaad lord Renbuu!
- from the publisher's blurb