Banshee Tower

From publisher blurb: Banshee Tower is a Fifth Edition plug-in adventure for four characters with an average party level (APL) of 1, 3, 5, or 8. The adventure sees the party enter the ruins of an old, overgrown keep in the forest, from within which a spirit’s mournful wails can be heard for miles around. To stop the spirit’s incessant keening, the adventurers must discover her remains and give them a proper burial. Until then, her presence will continue to endanger life in the forest.