Talk to Forman Rhamm, atop a hill in the Old Muckworks, to begin a series of heroic missions. For these heroic quests, if soloing, you should be level 7 or above, or have the companion. If you are level 6 or less, it is most likely not soloable for you, and you should look for a team.
You ask Foreman Rhamm how come he is standing outside and not in his factory. Rhamm tells you that this is Nem'ro's core plant, his most important asset. Now some crazy Evocii appeared out of nowhere and took the place over. One minute they weren't there, the next they were. Foreman Rhamm managed to get out, but the bog-rats took most of his workers hostage. He asks you to save him from having to charge into a crows of angry Evocii with nothing but a stick and a bolt gun.
You can ask him:
Evocii? Sounds easy
You didn't just hire someone?
What's the job?
Choose any of the options. The foreman tells you that the hostages are in the basement, but you can't go straight there. You need to use the main console to unlock the elevators. The main console is on the top floor. Get the elevators working, then go down the basement and free his workers.
Accept the quest and check your mission log:
[HEROIC 2+] Hostage Situation
Repeatable - This mission can be repeated once per day. It is reset in the morning.
Evocii raiders have overrun the Old Muchworks and taken hostages. Foreman Rhamm has asked you to take back the factory and free the hostages so he might avoid Nem'ro's wrath. Find the security terminal on the second floor of the Old Muckworks to unlock the basement elevator.
Your first objective is to find the factory security terminal. The entrance is to the very northwest. Enter the Heroic Area of Old Muckworks. Climb the ramp to level 2. Then fight your way to the east to find the security terminal. After you interact with it, you need to now reach the basement. Go back to the first level, and then to the southwest corner. Get on the elevator and go down. Defeat an Evocii Mastermind champion boss guarding the basement. Then you need to use the door controls to release the hostages. After they are released. go back outside and talk to Foreman Rahmm.
He tells you he has learned how the Evocii got into the plant in the first place. Workers overheard the bog-rats talking about their ship. Apparently they landed on the factory roof. But they're having mechanical trouble. He asks you if you would like to blow up the first and last Evocii starship.
You can say:
It will be a historic moment
Blowing up ships isn't easy
I'm done here [Refuse Quest]
Choose the first option. He tells you that he has a stick of detonite that will take a little ship out. Path to the factory roof is no joke though. Go past that retaining wall, up the hill, then walk real careful-like across the pipes leading into the factory. Then storm the place, blow up the bog-rat ship, and come back.
Check your mission log:
[HEROIC 2+] Hostage Situation Cleanup
Repeatable - This mission can be repeated once per day. It is reset in the morning
After freeing the hostages in the basement of the Old Muckworks, Rhamm informed you that the Evocii have somehow gotten their hands on a starship. He has asked you to go to the factory's rooftop and destroy it using a stick of detonite. To reach the factory rooftop, you'll have to climb a hill and cross a short bridge of pipes and grating. Head there now.
Your task is to find the rooftop access. If you look up you can see the bridge, but Finding the path leading to it can be tricky. Follow the foreman's instructions - Go past the wall, then up the hill.
On the road leading uphill, defeat some Renegade Evocii Reavers, Scouts and Firebrands to unlock a bonus mission, Clearing the Path, which requires you to destroy five reprogrammed turrets.
Cross the bridge, and locate the entrance to the story area. Your task now is to defeat the Evocii leader - Baranj the Starseeker - and his array of reprogrammed turrets.
Baranj the Starseeker is a boss, a level Rifle Grenader with 3,385 HP. He will have turrets assisting him. You should take the turrets out first, and only then deal with Baranj. Once you have defeated Baranj and the turrets, you need to plant the Detonite on the ship and get to a safe distance before it explodes. Then, return to Foreman Rhamm to claim your reward.
This concludes the heroic missions, Hostage Situation, and Hostage Situation Cleanup.