Infinite DC: Regeneration

Three incarnations of Neas, the Gladiator of Gallifrey, come together to protect two others. A teenage version of Neas's original life has somehow been ripped out of her timeline and into a post-Time War Gallifrey where she meets Al-Lee Kirsch, a lone human who is the descendant of Leela, an old companion of the Doctor's. Meanwhile, in 1996 Earth, a college professor has been targeted for assassination by a super-powered individual incapable of feeling pain or dying. And, on top of all this, Neas's father ("The Tinkerer") has been abducted for crude experimentation on a centuries-old Time Lord formula. How do all these plots connect?