This trophy is for doing Vetra's loyalty mission and helping out her sister, Sid.
*** Spoiler - click to reveal ***The mission is called Means to an End and starts by you reading an email from Vetra and then speaking with her aboard the Tempest. You will then be directed to H-047c in the Remav system. Head there and once on the planet, follow your HUD to discover an abandoned mine. A cut-scene will occur and you will then find yourself trapped with others in a prison of sorts. Find a way out. After activating the door and getting out, there will be steps to take to hide the other prisoners and take out some guards. After that, you're going to have to find a way out of the mine by exploring through several other areas of this prison, starting with the Mess Hall. In the Menagerie, you'll have to deal with more outlaws and a Fiend. Be careful if you've never fought one as close combat can be deadly to you. Stay away if you can. Next you'll head through the workshop, dealing with more security and guards and finally will find your way to Sid. You will have one final fight with some more guards and their leader, Meriweather. At the end, you'll speak with Sid and Vetra and the mission will end, unlocking the trophy.