It's strange that a shrine to a vanished god should still be taking sacrifices. Not everyone forgets a forgotten god. The party explores an old shrine to a demon lord, kept up by a superstitious local.
This AD&D scenario is designed to be a humorous departure from regular adventuring. The "heroes" are a fellowship of monsters on a quest to recover a magical item for an orc chieftain whom they have displeased. Having lost the map given to them, they must gain entry to a frontier outpost - probably by sneaking through sewers - and recover the map from a locked safe in the commanders quarters. Once they again have the map, the monsters must travel overland to an abandoned elven witches' temple on the shore of a mountain lake, where they will find the object of their quest. Pgs. 23-32
Stepping through a door can mean a grand adventure - or a horrifying death. The shortest distance between two points is not always a straight line. A number of magic towers connected by failing teleportation magic. Abandoned in ages past, other creatures now make the towers their homes, and provide challenges to parties of varying levels.
On a storm-blasted mountain lives an immortal Arch-Mage with a foul temper. The townspeople want you to talk to him - and kill him, if necessary. Is immortality worth the price? An Arch-Mage's magics threaten a small village. To protect it the party must brave a dangerous climb, and survive the Mage's warded lair.
Not everything worth stealing is worth cash The party must recover a stolen patent of nobility from a thieves' guild, in order to stop a civil war.
Everything would be fine if the person you're trying to help wasn't already dead. The requirements of honor reach even beyond the grave. A spirit asks the party to help grant it passage to the afterlife.