Hiro was a Zombie assassin...he explored an abandoned Mall for food...it was loaded with zombies...he's killed every single one of them...till he sees you

"good bye, Zombie scum"

you looked into his eyes...he looked into yours...your pupils were human like

"in bringing you to the safe zone to be tested on...you...don't look like other zombies.."

he knocks you unconscious and you wake up being tested in a lab