Konoha's history was completely altered after the Pein Invasion. Tsunade, having not fully recovered her chakra levels, succumbed to the side effects of her lifestyle, and with her passing, Danzo was the next elected hokage. Under his intense regime, the shinobi of Konoha were now his to manipulate, pawns in his own personal game of retribution. With receiving word that Uchiha Sasuke was currently his number one threat after discovering the truth behind Itachi's secret mission, Danzo forced many into doing his bidding. Whether he held a kunai up to their throat, or those of their loved ones, he always got his way. His dictatorship was not only limited to shinobi, but medical nins as well. Sakura in particular, seeing as how Danzo originally propositioned Shizune first, but with her undying loyalty to Tsunade, refused.
Sakura would never forget that day.
Shortly after lunch ended, she found herself being suddenly grabbed by two masked ANBU members, and hauled off into a dark holding cell, enforced with chakra as to keep those inside… utterly powerless. With the ringing in her ears as the heavy metal door slammed shut, Sakura felt around in the dark, eventually finding her footing. Stepping cautiously over towards the nearest wall, she followed it's border until she came to what felt like a window of sorts.
Immediately banging on the pane of glass in front of her, Sakura shouted for help… something just didn't feel right. Beginning to panic, Sakura tried to calm herself down enough to concentrate all of her chakra to her hands in order to bust the glass and crawl her way out. But just before she could deliver her blow, a light was finally turned on. Flinching away at the sudden brightness, Sakura let her eyes slowly adjust, noticing two people standing in the room behind the two-way mirror. As she realized who the two figures in the room were, Sakura slumped against the glass in fear, her blood suddenly draining away from her head, all too scared to know what was going on… and why she had to be privy to it. Although she couldn't hear anything, Sakura tried beating on the glass once more, but no matter how hard she tried, neither of them seemed to even know she was there. She couldn't even muster chakra to her hands, her pathways had been blocked temporarily by a few swift taps by one of the ANBU nin before throwing her in here. It was all Sakura could do as she looked on helplessly.
Standing in the middle of the room, arms and legs chained to the ceiling and the floor, was Shizune… Danzo standing before her. Sakura could tell she had been put through the wringer by the looks of her bruised and battered face. With a broken nose, some missing teeth, a busted lip, and two black eyes, Sakura's heart cringed for her beloved senpai, crying out as she watched Danzo unsheathe his katana. Using its tip, the old bastard lifted up Shizune's chin as they exchanged a few heated words, their brief conversation ending when Shizune spat blood directly into his face. Before Sakura could inhale to scream, she watched as Danzo's blade pierced straight through the brunette's chest. Her eyes widening in fear, tears falling from them as she screamed out, beating on the glass as she tried to force her chakra back to her immediately. This could not be happening…
Pulling the blade out slowly, Danzo watched as the light left Shizune's eyes, her lifeless head drooping forward as the crimson stain beneath her widened. He had never held any true respect for kunoichi's anyway, and as such didn't bat a lash as he took the life of one so ruthlessly. Turning his attention towards Sakura now, knowing she lay just behind the mirror along the wall, he slowly walked over to the glass partition, smearing the fresh blood as he scraped his blade across the glass unhurriedly over Sakura's trembling face. As the speakers in her room clicked on, she could her the deep rumble of his chuckle as he cleaned his blade with the sleeves of his haori and returned it to it's sheath in his cane before propping himself up, staring dead into the space where her eyes would be.
Cornered by fear, Sakura became the next pawn in Danzo's army. That day he had forced her into becoming the head of his research and testing facility. Working her to the bone with almost no sleep, Sakura was held hostage, Danzo milking her and her abilities to concoct new war grade poisons and toxins… and testing them, sending her prisoner after prisoner to experiment on. When she was alotted time to sleep, it didn't find her anymore, all the faces, the countless faces, becoming imprinted in her memory forever. She wasn't a healer anymore. She was a betrayer. She was amurderer. Holding herself accountable for her weakness, but too scared for her life to do anything about it, she begrudgingly let this continue for days…? Weeks…? Months…? She didn't know anymore. What she did know was that she had lost contact with the outside world, forced to play this unfair game. Fearing no end to this tortuous life she now led, she even thought of ending her own life, hoping that would kink up the old man's plan, but she was even too scared to do that. She was a kunoichi, but she held no power anymore… yet again, she felt helpless. But that would all change as soon as her next test subject was delivered to her.
There before her, strapped to her operating table, was the one and only… Uchiha Sasuke.