The whole pack hears Lydia scream, even from miles away at Beacon Hill community college. They all know where she is. She is in her research lab that she had gotten when she blew threw med school. She had holed herself up in her lab ever since Stiles got his mothers disease in high school.
The pack didn't know why she was screaming it didn't sound like her usual scream for the dead, but one of sorrow. The wailing woman. The were wolves alerted the humans and they all started heading for their friend Lydia.
Scott was the first to get there afraid to go in without the others, so he waited for the rest if the pack. When they were all there they all stormed into Lydia's lab where they found her lying on the ground crying. Allison rushed over to her, the others stared not knowing what to do.
"Lydia what happened?" Derek asked finally breaking from his stupor.
"I did it." Was all she managed to choke out.
"Lydia what did you do?" Scott asked knowing the answer already.
"I found it, I found the cure." She sobbed.
The whole pack stood there, doing nothing. If they had found it 4 years earlier they would have been overjoyed. But it had been 4 long years for the pack, since stiles' life had been ended by something as simple as a disease. Not taken down by a werewolf, or kanima, or even an alpha pack, but a brain disease.
