Set-up..Ready

When expiment 664 escaped all goes crazy. Luke works at a testing building trying to handle work,school,and a little sister.His father is the owner of the place. Everyone goes looking for 664. Only some survive and most died. What happens when Luke sees her on the street. A robot with paronormal powers? And the abiblity to slice someones head off in a split second?
(**Please dont judge on the description i suck at these. But please read!!)