Dr. Hilden at Camp McCarran had always wanted the information about plant life from Vault 22 and Mercy had gotten pulled into it by with him. His assisstant knew of Keely and asked her to please look for her and she agreed.
Mercy was muttering under her breath while she collected what she needed before asking Sergeant Dharti permission if she went to go to Vault 22 when Bitterroot beat her to it of course. They took the chance to go through the vault after killing off giant mantisis and crazy ass plant humanoids who attacked them without much remorse at the time.
They even managed to find Keely after all that hellish nightmare and she agreed to help make some gas explode on the fifth level where she had some leaks made in readiness of the time when someone chose to help her with getting it blown sky high. Bitterroot was about to protest when she calmed him saying, "I'll be back before you know it love" as she stood on tip toe and kissed him.
He muttered, "You be careful Mercy, I don't want to carry you home in a body bag anymore than having to tell your father how you died in pursuit of fucking knowledge about this shit."
She scampered to the elevatier and had gotten down to the fifth floor and she found a room where she could shoot the gas that was leaking and also keep herself alive while trying to do it and pull it off for Keely. Meanwhile, the ghoul asked him, "How did the two of you get together? I knew her father for a while before Hilden sent me here with countless other mercs too. But still, it seems odd that a blind medic would volunteer for this kind of job."
Bitterroot asked her,"How did you know she was a blind medic Keely? And, well, we've grown up together ever since we were children at Camp McCarran. And well, the bastard asked her about about coming here, no that's bullshit. He managed to get her to agree to come here for some fucking data that was here and all Jane wanted her to do was to go and find you. So, that's why we came here, was to only find you and destroy the data about this shithole. If you'll pardon my langauge here."
The ghoul laughed as she agreed and went to keeping an eye on the montiers when Mercy arrived back in the room, looking the worse for wear because of some second degree burns on her body. Along her arms, ribs, and her back and shoulders too. She smiled weakly before saying, "Keely, the job's done. It was fucking crazy because I had to kill off some spore carriers and one beat my ribs to the point where they cracked I think. And I had gotten the burns from the blast as the grenade went off, but at least, it's done now."
Bitterrot went to help tend to her wounds while Keely helped them get the data destroyed once and for all. And the three left together and headed back to Camp McCarran to inform the good doctor of the story behind the vault's destruction. Once there, she went to get some clean clothes and to get some salve made for her burns to help get them to fully heal without getting some massive scarring left behind when her ribs began aching again.
Her father asked her. "How are you feeling baby girl? And how the hell did you get burned and beaten nearly to death?" And she answered saying, "Well, Papa, Bitterroot and I were sent to Vault 22 to deal with getting some half crazy assed data for the doctor here for some sort of fucked up research and well, Jane asked me to keep an eye out for Keely. Which we did find by the way. And well, she knew that we had to destroy both the data and all relating items to the entire fucking vault. So, I opted to make some gas that she had leaking into the fifth floor explode when he told me to be careful, and I agreed. The cracked ribs are from a spore carrier brute before I finally had gotten it killed off and as for the burns, well they came from when I made the gas go boom and took refuge in a side room for protection."
And after that, she settled in for aiding Jane with their various patients as the former doctor was sent off to the northwest California state because he was crazier than anyone else thought of it of course.