Ok, here is a fleshed out adventure idea I used recently with my group:
4. Background- Jorac has been trying to run a small slaving operation for a few years out of Tharban, but without much success. More often than not, he would abduct poor or destitute individuals from the slums and sell them on the black market. After several run-ins with the authorities (particularly a paladin named Conrad Herwitz), Jorac was badly wounded in a battle, and attempted to flee by jumping off a pier near the docks. However, Jorac was more badly wounded than he realized, and soon he found himself in danger of drowning in the lake. By some chance, he managed to wash up a short distance away from the docks, and too refuge in one of the sewer tunnels that empties into Lake Geizen. He slipped in and out of consciousness for several days in the tunnel before he felt himself being lifted and taken deeper into the sewers. When he awoke, his wounds were closed, although ugly blackish-purple welts covered his body. Vothis had heard of Jorac's reputation, and when he found him near death in the sewers, he brought him back to his sanctuary, healed him, and struck a deal with him. Vothis would aid Jorac in gaining the power and wealth he wanted in return for loyal service to Vothis- or he would be killed. Vothis agreed, but terrified of the beast Vothis. For the past two months, Jorac has worked for Vothis, abducting people from the slums and bringing them to a site of Vothis' choosing- and the poor kidnapped unfortunates are never seen again.
Vothis is what remains of a young nobleman named Kirk Wallachan. Kirk was fascinated with esoteric and occult studies, and came across information that described a place called "the Well of Faceless Reflections" Intrigued, Kirk and two of his friends set out to find this mystical site, only to discover it was in fact located on the site of an ancient shrine of Anhur. When Kirk and his friends looked into the pit, a wormlike creature emerged from the pit and forced a tendril down each of their throats, injecting its spoor into them. The three men's flesh melted away from their bodies at they were devoured from the inside by swarms of insects, spiders, and other vermin, then battled to the death to prove themselves to the Wyrm of Halogroz. The being known as Vothis won the conflict, and has served the Wyrm faithfully for the last four years. Three months ago, Vothis came to Tharban to plants the initial seeds of decay in this corrupt den of humanity. In order to advance his plans, he needs to make more verminites, which requires him to acquire human bodies for his spoor to devour, and skins for the new verminites to inhabit. Jorac has been bringing Vothis one or two people a week for the last two months, and there are currently five mature verminites under Vothis' control. However, one unfortunate side effect of Vothis' verminite spawn is that their skins begin to decay and be consumed after just a few weeks of use, easily revealing them to casual observers. Vothis, in the guise of Mord, a student at Helmholtz University, approached Janeth asking for a potion made from arsenic, fermented oak bark, wax, and rose extract to preserve the skins of the other verminites. Janeth made the necessary potions for Vothis, and gave him the formula to make the potion.
Setup- Having no further use for Janeth and worried she might realize what the potion was for, Vothis ordered Jorac to abduct Janeth and bring her to his holding area to await "conversion". In the meantime, Jorac has been busy- he found 2 young children (Dimil, and Kiram) in the slums whose mother had been murdered the night before. He took them back to the safehouse to awat further orders from Vothis. From the time the adventure starts, the PCs has two days to find and rescue her aunt before Vothis returns and claims his prize.
Possible leads/Information- 1.The night Janeth was abducted from her home, the neighbor next door (Jarvis) spotted a man milling around outside the apothecary. He seemed tense, and toward dusk, he went down an alley towards the back of the house. The man was Toram (early 20's stocky build, short brown hair and beard, broken nose, scar over left eye).
2. Examination of the apothecary indicates the back door was forced open, and a scuffly did break out in bedroom upstairs. A tooth is lying under the bed that belongs to Holt. There is also some blood spattered on the wall of the room.
3. Golin, owner of the Grumbling Goat Inn and a long-time friend of Janeth saw two men in his tavern the other night who were well into their cups. He remembers one of them mentioning Janeth, as well as a man named Luz, a local tanner. (Luz is also in league with Vothis- he is the one who makes the skinsuits). Something to the effect of "Old Luz is sure going to have a time with that bitch Janeth, she's a feisty one she is!" He saw the two men (Holt and Toram) leave the Inn and head towards the docks. Holt is about 30, shoulder-length blonde hair, and a dark tan. If he learns of the tooth found in the house, he will suggest for the PCs to visit Madam Chavala- an eccentric but respected medium living in the slums. She might be able to offer more insight.
4. Janeth's ledger mentions making a large quantity of potions for a man named Mord- a physican's student at the local university. No one at the university has ever heard of a man named Mord, but if shown the ingredients of the potion, they could speculate that it could be used to preserve dead bodies, or to tan hides.
5. If Madam Chavala is sought out- she can look at the tooth and tell the PCs where the owner is- in a wooden building by the docks near an old stone building that is falling down, and that there is also a crippled dog near the building.
6. If the PCs talked to Golin, Grimnir will notice (he is staying at the inn). One of his clansmen disappeared about a week ago (Grimnir was supposed to meet him at the Grumbling Goat two days ago). Golin will remember Fafnir being at the inn up until 5 days ago, but has not seen him since then. Golin does know that Fafnir got into a brawl with Toram and Holt, but he hasn't seen him since 2 days after that. Grimnir is waiting for Toram and Holt to show up again so he can "question" them. He will overhear Golin speaking to the PCs, and approach them asking to join forces. Even if they refuse, he will follow them, hoping they might lead him to his lost clansman.
7. Beggars and homeless in the docks and slum areas are terrified of a being they call the "whispering man" (Vothis). He is only seen at night, and while he ignores almost everyone he meets, a sense of dread follows him around, and a constant low noise comes from him, like many voices whispering softly. He is seen most often in the slums, but occasionally along the waterfront as well. All attempts by the town guard to find or question him have a failed- it is sometimes reported he vanishes into this air.