Hunters of the Pale Flame

A Witch Hunter from the Order of the Pail Flame (the most renowned among the Monster Hunting Guilds) has received a most mysterious contract with no details apart from Instructions on where to meet his brothers and sisters of the Order, and where he can meet the contractor. However, the contractor does not appear at the Appointed meeting time, and the company of hunters are left to find out what happened. They soon find out what why they were sent there, but it is at great peril. Their investigation ends up at an abandoned watch tower in the middle of an aching forest, what they find inside wishes to kill them all, and is well within it's capability to do so.