The Enoch Pill

The world was changed forever when scientists developed a pill that extended the human life span indefinitely. It was distributed free of charge, to the furthest corners of the globe. Everyone was about to live forever. Well, almost everyone. When 18-year-old Kizzy Cartwright learns that she's immune to the immortality-giving pill, it makes her a social outcast. Her only hope is to find the missing scientist who invented the compound, otherwise she'll be the last person to grow old and die.