Lilly raced to the sound of bricks crumbling. Grey dust filled the corridor and choked her as she squinted, seeing three shapes huddled in the bleak. As the dust cleared, she identified them as James, Peter, and Sirius, the last of which was on his back and had his leg pinned under a chunk of the fallen debris. A wall of misshapen stone blocked almost the entire doorway to the potions room. Lilly quickly dropped to her knees and attempted to help the boys move the rubble off of Sirius' leg, but when he cried out in pain and blood welled from his trapped limb, the three students gave up their efforts. A feral growl could be heard rumbling from the other side of the collapse.
"What is in there?" Lilly demanded. Sirius looked up at her, both gritty stone dust and his own dark hair plastered against his forehead.
"A werewolf," he replied weakly, and Lilly's eyes widened. She took a count of the boys, their numbers only being three. Where there are three Marauders, there is always a forth.
"Is Remus in there with it?" She asked, and Sirius nodded mutely, resting his head against the cracked marble floor and breathing deeply. Lilly could see that Sirius' shirt was dampened with blood, causing it to stick to his dented ribs. He was hurt worse than just his leg being crushed.
A human scream echoed in the battered hallway, and James tore ferociously at the crumbled wall, his eyes wild and face pale with terror. His hands were scraped and cut against the rough rock, and Lilly pulled his shaking body away from the barrier. "If we accidentally bring down another slide, it will bury Sirius alive," she said- which caused James to back away from the wall and divert his attention to his fallen friend.
"Peter," James said quietly, kneeling next to Sirius. "You need to get you and Lilly out of here. Take the map, go get some help; a teacher."
"I'll try," Peter croaked out, timidly taking Lilly's hand, his palm sweaty and fingers twitching. Lilly snatched her hand away from the small boy, causing him to recoil slightly.
"I'm not leaving you two here alone!" She yelled, taking James by the arm and forcefully pulling him away from Sirius, which sent James sprawling across the ground. "I know twice as much about first aid as either of you. I need to stay here with Sirius. You go with Peter and get help," she said to James. A yelp came from across the rubble.
"What if the werewolf gets out?" James asked.
"All of us will be done for if a teacher is not here before then."
James knelt next to her, staring anxiously down at Sirius. James took his friend's clammy hand. "I- I am going to leave you with Lilly for a short while. I know you two do not really get along great, but she- she knows her stuff. I will be back soon- so will Peter. We are just going to get some help, so... be your stubborn self and do not go anywhere." James got shakily to his feet, and then stood firm, keen determination in his dark eyes. He pulled the Marauder's map from his pocket and took Peter by the arm, leading him away into the destruction.
Lilly sat alone, holding Sirius' head on her lap. He was pale, but his cheeks were flushed and his temperature was rising. "Hold on Sirius," she whispered "Help is on the way." She looked to the wall. After a few pained howls a while ago, the other side had gone silent.
"Remus?" She asked nervously, uncertain if she would hear his soft voice answer her. She liked Remus best of all the Marauders; he had never hurt Severus or teased her.
"Lilly, is that you?" A hoarse voice called back, and though it was not a Marauder's, Lilly knew this voice very well.