From the introduction: People come from all across the Forgotten Realms to view the Light of Two Forks, a miraculous window into another plane of existence. Among this crush of revelers are princes and paupers, sinners and saints, warriors and pacifists, all looking to the sky in wonder. From the lights comes a storm. After a massive explosion above shows the world with fire and death, a brave few must rise up as Heroes in order to save the people of Two Forks and, perhaps, all the Forgotten Realms from the ravages of the Undead, a Mechanical menace, and something far worse... A 4-hour adventure for 1st level characters