A Warlocks hidden daughter >> Raphael Santiago Love story

When Katherine Willows goes to Pandemonium one night her hole life changes, when she meets Magnus Bane. He looked like her, but she finds out a secret her late mother kept from Magnus and Kathrine. After that night she is dragged into this world where she has to try to adapt, when her best friend Simon gets kidnapped Kat meets a hazel eyed man. When the clave and valentine go into a war that might end all Shadow hunters. What if Katherine fell for the vamp and the vamp to shared the same feelings, but what if valentine came to her and said your a powerful warlock like your father come with me and nobody will get hurt!!!!
What will she do, will she make the right decision in time to save everyone she loves...