Back to the year 2020.
Twenty five days had passed since Anastasia was taken into the underground laboratory.
That time, everything was going smoothly. The operations and experiments were seamless so far. A number of outcomes led them closer to their goal.
The things was, the scientists were observing the effects of "Lazarus" on a living human body. They had switched from a corpse to a test subject who's still alive when she took a dose of the formula.
There, they all found out that it had a higher chance of working if the person who would be resurrected had taken it when they were still alive - not when they were already dead. Once they died, they would return to life with the help of that formula.
In order to ascertain this hypothesis, they had planned to kill Anastasia after experimenting on her for almost an entire month.
At the end, her death was actually already set in stone. She won't be spared even after all they did to her -
