I'm going to be running a Dark Heresy campaign for the first time and wanted some feedback for the first mission. Here's what I have so far.
The acolytes are being sent to a planet to investigate the death of the imperial commanders heir. He was killed in the basement of the commander's palace in what appears to be a chaos ritual where he was the sacrifice. What the acolytes do not know is that the heir was the leader of chaos cult and was murdered by his younger brother who is part of a rival chaos cult. The murders left evidence to implicate the heir's cult in the killing. Both cults have members filling key roles in the planet's administration and it will be the acolytes task to uncover and eliminate both cults.
The current ideas I have are that the acolytes arrive on the planet and are assisted by a member of the rival cult who controls part of the local enforcers. The rival cult uses the acolytes to eliminate members of the former heir's cult and give them support by allowing them use of enforcer kill teams. The twist comes when one way or another the acolytes find evidence leading them to a member of the rival cult. The enforcer cultists send kill teams loyal to them with the acolytes to "assist" them but actually leading them to an ambush. After the acolytes storm into the building with the cult member they find themselves surrounded when the enforcers "backing them up" betray them. The goal here is to get the acolytes captured where they will be resqued by members of the heir's cult. The cult offers to help the acolytes eliminate the rival cult if they are allowed to escape afterwards
Tell me what you think. What I'm stuck on is the making of actual adventures for the acolytes that go along with this idea. Any help or advice would be greatly appreciated.