From the back of the book:
A GM Adventure for dT&T and Tunnels & Trolls
Your adventure begins on a small path that branches from the Great Khazan Road and leads at a cave mouth in the mountainside. Inside is the fabled Trollstone Caverns, home lair of the legendary Silver Serpent, and also for a large clan of Uruks—the Scarlet Wolf Clan To these caverns you have come in search of adventure, loot, or possibly even the venom of the Silver Serpent, a very valuable item among the mages in Khazan, certainly worth the effort - if you can survive!
This adventure is meant for 1st level and other beginning characters, It is meant for parties consisting of the good kindreds only; namely humans, dwarves, elves, leprechauns, fairies, and hobbs. It is possible that uruks might join such a party, but do not allow any other monster kindreds in.