The box includes six poster-sized maps, half of which are tactical displays of village and battlefield settings, while the rest detail the three-levels of the mountain's interior. Six cardstock mini-maps show self-contained sections of the mountain that can be attached to the poster maps at various locations or simply set aside. The new Monstrous Compendium pages showcase several opponents, such as the gnasher and the brain spider.

Book One outlines the search for a map to Dragon Mountain, a plane-shifting construct that appears in a random location every couple of decades, and a magical item that will improve the party's chance of survival once they get inside. The hunt takes the player characters to a variety of sites, such as crypt of dancing wights and a snake-infested swamp.[1] Books Two and Three lead the characters through the city-sized labyrinth of Dragon Mountain, a maze of traps, ambushes, and dead ends. The adventure concludes with a journey through foggy ruins that leads to the home of the dragon.

Contens of Box are:

Box Book I (64-page book)
Book II (64-page book)
Book III (64-page book)
Heavy cardstock counter sheet (48 total)
Fold out maps: 6
Accessory cards: 14 (cardstock sheets)
Handbouts: 14 (single sheet)
Monstrous Compendium pages: 8 (single sheet)
Strip of plastic stands (24)