Blood bound

"Growing up, every year at the same time on your birthday there was a knock on the door and While everyone was sound asleep, you would always go and check who it was to only to be met with nothing and no one . But On her 18th birthday, the knock happens as usual, but this time someone is standing in front of you. A man. He was very handsome and looked oddly familiar- he was the one from your nightmare last night-a person who wielded powerful magic and saved you from a dark being during your dream. Without a word he shows you the symbol on his neck.
Every person is a puzzle. Some are missing a few jigsaw pieces"