Jill was on the search for ammunition for her machine guns at the time when she received the message from Albert Wesker, her superior. Inside of her head, she wanted to fight the power to obey him, but she couldn't at the moment and her body turned around to leave where she was searching and running in the direction towards. Jill would only make him wait for the time that it took to get there and to check out the situation at hand if there was one.
Once arriving, she did not find him in his office or anywhere in the building, she went to the bottom floor and then the basement, staying as close to the outside as possible. Jill's footsteps were soundless and she was sneaking until she found out Albert's situation, not that he didn't have a problem dealing with them, but he could use a hand. She bent down in the dark area where she could not be seen or heard, she listened to the word exchange before deciding to act. The EX-STARS member ran back to the stairs, up them one floor and pulled out a bag of explosives she had made herself the day before: C4.
Setting them up, she put them on the ground on the floor above the basement. Once the charges were set, she took a bit of a step back and out of the floor and to outside as far as the wireless connection between them would go. Once she was sure she was ready, she flipped open the controller and pressed the button. The seven charges she laid would force the ground above them to cave in with a marvelous display of granite and fire coming down around them.