From Introduction: Most citizens of Pinebox are excited that the Green Mark Corporation is moving in. The jobs are welcome and most folks are excited about the prospects. Among the few who are critical of the change, however, is one individual who takes personal umbrage at the news: the Skinwalker. He believes that parts of the forest are sacred and that Green Mark is encroaching upon that sanctity. The only way to restore order to nature is through an offering of blood — Green Mark blood. This adventure is written for four fourth-level characters. Because combat is secondary to the unfolding mystery, game masters should find it easy to scale the adventure for any party. Refer to Appendix V: Experience and Mechanics for information on how to scale the adventure.