This solo is a level 10 adventure and should give you 1.5-2 hours of challenging playtime. However, as the quest is shorter, the peril is necessarily quite a bit higher, and so the player should be prepared for some lethal encounters. In all likelihood, it will take a couple of play-throughs to defeat, so don't expect an easy stroll through this adventure!
Your PC starts in the village of Woodholme, where they learn of an undead infestation in the tomb of a revered local hero. There is half a page of backstory to give you an excuse to go and kill some bad guys, and then you go and do just that! In the spirit of AD&D, the quests in the Adventurers Wanted series will not concern themselves with complicated adventure hooks. They will be simple, notice-board like quests that solo PCs can pick up between adventures.