“ The secret for immortality has been discovered by an eccentric wizard/mad scientist. Its found you need to reapply once a month. As people stop dying, and the birth rate increases exponentially, people are forced into homelessness, because of the need for food reamins the same, and food is not being produced fast enough to feed the undying population. The PCs have to find the creator and kill him, and destroy production, to save the world from undying, unending torture from hungryness.”
“ A casual remark by one of the party about something met on a previous adventure leads to a summons to and grilling by the Mages' Guild (or equivalent), probably resulting in an expedition back to that area to recover the things for study by the Guild. The party's presence will be 'requested' for this expedition.”
“ Nearby is a region of many curiously shaped hillocks. Last week a tremendous storm washed one of these half away, revealing a strange shed made of concrete panels. Its long side is aligned east-west, about 4m by 3m and 2.5m high, with a flat roof slightly sloped down to the north . The double doors in the south side have murky glass panels in them, but nothing much can be seen from outside, although it looks a bit like the top of a staircase. Will you dare go inside? What will you find there, and what lies below?”