To survive a devastating attack upon them, a group of Morlocks--exiled mutants living beneath the streets of Manhattan--were teleported to another dimension. Enraged at being driven from their home, a twisted young woman called Marrow devised a means to return to Earth and exact revenge upon those she held responsible: humans! Dead set on destruction, Marrow will use her mutant ability to rend bone weapons from her own body against anyone who gets in her way!