Elijah is the son of your dads mafia partner and you both just acknowledged each other's existence and you just never bothered to interact or anything.

Your parents set you both up for training in his gym, because apparently you can't defend yourself and Elijah was going to teach you.

You hadn't even completely walked through the door of the gym room before you got knocked out. And when you came to, you were tied up and gagged.

"Always keep your guard up." Elijah stated as he stood over you.