Florence

Satak was sure of it now, he felt it rush throughout his body in a sudden rush of cold. He felt his eyelids grow weary, a sure sign of the poison that now freely flowed through his veins. He struggled to remain standing, grasping onto a nearby chair, relieving the pressure on his body; his joints aching and groaning. The world was beginning to slowly oscillate, causing him to have the sudden need to vomit. His thoughts drifted back, back to when life was simpler, when his life wasn't in any form of immediate danger. 
Flashback
Satak leaned back in his chair, his work done for the day, and that meant no detention for him. He grinned slyly, and stood up quickly from his desk. The teacher had left the room, and that meant he could do what he wanted. He quickly ran over towards his sister, and hugged her in a friendly big-brother way.
"Hey Sis, you getting this work done?" 
"Oh, C'mon brother, it's not fair. You are so smart at school, but act like a jerk at home!"
Satak's smile lost some of it's luster, but he pressed on regardless.
"Don't worry Sis, I'll change. Just you wait."
Flashback over

Satak looked up at the ceiling, the lights creating black spots that danced around his vision. Tears threatened to spill from his eyes, but he wouldn't cry. If he was to be strong, he wouldn't cry. He had a job to do. He stumbled forwards, looking ahead now, his movement shaky, but full of will and purpose. His hand, pale and skeletal, just grasped the alarm system and pulled the trigger down, causing a piercing alarm to run through the complex. His body collapsed to the floor, energy all but spent, the shrieking noise passing through him. His long white hair fell over his eyes, and it hid from the world a single tear that ran down his face. Satak always thought the disease would kill him, but instead poison sped up the job.
"Sorry Sis, looks like I failed you. I'm so so sorry."
And with that, his eyes fell shut, leaving an empty body lying against a white wall, mourned by no-one, leaving no legacy.