From publisher blurb:
This is our 41st installment of the one-page dungeon series. The objective is to create self-contained adventures/dungeons with all things necessary to spawn fun adventures on a single page. It is system-neutral so it can be easily ported to any system. It shouldn't be much trouble to include it in any medieval setting.
In Generations of Guilt, the heir of a family that has been powerful for generations reveals a terrible secret. An ancestor made a nefarious deal with a demon and promised it the first three infants sired by himself and all subsequent patriarchs. In exchange, the demon gave them power and influence. All his descendants complied with this terrible clause. Except for the current head of the family who wants to stop this madness. He hires the characters to go confront the demon.
When the characters explore the family crypt, they find it crawling with undead abominations. Dead family members whose souls shall become the demon's fodder if the current patriarch doesn't comply with the blood deal. In their anger and despair, they attack any trespassers. The characters must fight these forces to reach the demon, who shall tempt them too with the promise of an easy, lavish life. Will any of the characters surrender to the promise of opulence?