Two that I ran recently that was actually a bit of fun (it was one but was linked)
Four old people get in contact with the group, they look pretty battered and bruised. All low level mages. They say a gang has pretty much kicked them and other old people out of their retirement community and are needing it back (pretty much play up their fear of the runners, and they have no clue what they are really doing, they only SR stuff they've see is on the trideos). They can gather up some really small amount of money for the job (this is a feel good run if your group is into that).
If the runners go for it, they find 19 (feel free to make adjusments) gangers. 15 of them look absolutely identical, have blank looks on their faces, if runners approach the gates they will stop them and respond with "go away," or other real simple things. Assening finds that they are all spirits (spirit of man, pretty low level, of course adjust the numbers to taste and difficulty needed). They are 3 mages that summoned them all (5 per) and then a 4th more powerful Orc mage that they may see wandering around. Simply taking out a mage takes out their spirits, orc mage will run and try to hide, and be tracked into the basement that is a place of power (I'm blanking on the term) but basically from 4e +2 for black magic traditions -2 for all other traditions. He'll give up if he gets hurt too bad, he was paid a good bit of money to do the job but he has no idea who he's working for.
Most of the pay is going to be found on what the spirits drop (brand new guns, adjust to taste).
If they question the old folks, they will tell them that they are all mages but pretty weak, most of them made a living doing parlor tricks and such, but the area they live in normally keeps gangs out because it is rumored to be haunted (most of the mages tend to specialize in illusions).
Few weeks go by and they see on the news that <insert the name of the retirement area> has had a massacre, 15 orks killed and ritually sacrificed. And there seems to be high definition trideo showing the team leaving the compound covered in blood (weeks later of course). KE offering a reward for the capture. (I had a AI ally of the team actually intercept the data and wipe KE (they have some powerful friends) temporarily to give them some time to get moving without everyone in the city going for them but there are various ways to do this, but gave them 2d6 hours after that I rolled 1d6 per hour, once I rolled a 1 the data was recovered and they were public enemy #1).
Working through contacts they were able to get the hardcopies of the police evidence with a fingerprint that led them to one of the old men. From there they tracked down the rest. 2nd was meeting the 1st in a subway a few hours later because #1 wanted out. #2 can lead them to # 3 & 4 which are meeting with a friend (Drexel the Dragon from Splintered State is who I used, who was the person trading them the ritual for something else). KE won't touch the house they are meeting in since it is Drexel's and he has diplomatic immunity. Team can do the stupid thing and go in and make the dragon upset (of course adjust to taste) or simply wait for them to leave.
The four old men were actually fairly powerful illusion mages with masking to hide their magic rating down to really low. They were really old and decrepid and sacrificed the 15 people in a blood magic ritual (that they had learned about from a "friend") to rejuvenate them. They were really sloppy and it did't work too well (maybe took 5 years off of their age), and they had the trideo feeds installed across the street to show them bringing in the sacrifices in crates and leaving finally under the physical mask of the runners (or some of them at least depending on size).
Other clues was that the runes drawn in blood in the basement (where they were sacrificed) matched a run on a pendant that one of the mages was wearing (memory 1 test, and then a knowledge test to determine that it was blood magic).
My team handled the 2nd run really well, first two were knocked out and bound, kept sleep with a narco jet IV drip, and they got a confession from #1 on what went on, sent it to KE and KE arrested #4 leaving Drexel's, #3 I had killed by Drexel during the meeting.
My team is super paranoid as it is and seemed to enjoy tracking them all down and avoiding detection while they were PE#1. And them being framed got them emotionally vested. Payout was the reward money for the capture of the perps.
Also would be a good chance for them to earn contacts in KE and things while clearing their name.