I found a 16 quality agent that gives just about all combat missions in Adrel system so I have been doing a bunch. Every so often one drops an Angel ships log with a discrete number attached to it. Reading the log gives various messages but always mentions another system. Going to that system and finding the facility mentioned in the log starts a deadspace mission.
On the one I went on it mentioned how the pirate who left the log (he wouldn't be needing it anymore thanks to me
) kidnapped a woman and took her to another system. Unfortunately for me that system was 15 jumps away. I jumped there and in the system was an Angel mining facility just like in the log. Going to that facility there is deadspace jump gate that requires a key. Destroy the facility with the key and then jump. When I entered that system there were about 25-30 ships and defense turrets including an angel cruiser, the first I have fought. After kiting out of range of the turrets I destroyed the fleet then turned on the turrets. Another jump gate requiring another key is in the system. Get the key and jump and enter another system with many more turrets this time but also ships including another cruiser.
After I cleaned up this group there was deadspace control facility in the middle of the area. Destroying it drops a 5th tier overseer's effects. Earlier in this mission I got a 3rd and 4th. I never figured out where the girl was and since this mission was so massive I ran out of ammo and had to quit. It was really challenging in my frigate though and I am curious if there is a way to find and save the girl.