The Mars Effect

The story starts in the middle then goes to the beginning and then ends. At the same time nuclear war erupted on earth rebels slits his wrists and creates a mars effect… and like magic and kids, Gen xers are made immortal and impervious to harm. So they travel the galaxy trying to die but when faced with the fact that they can do not want  to, all the while being attacked by zombies controlled by  comic book villain named Neville.