Silent Legacy

In the year 2096, an epidemic known as the K12 virus has infected the entire human race, killing billions and leaving the world in chaos. Now with no leadership, a group of the most powerful companies on Earth have come together to create a one-world government called the UTO. This new alliance will find a cure to save the world, but there's a catch. Everyone must receive a booster shot once a year. Also, the vaccine comes with a marker that attaches to your DNA, making it possible for those in power to track your every move. Now in 2305, the cost to get an injection is so high that parents must sell one child to save the others. So how can two fifteen-year-old girls from 1865 and one young boy from 1995 save the world and change their family's legacy?