You were on a case with your dad like every day of your life. Until the mysterious portal is open below your feet and drown your body into it

The next second you’re standing in the apartment that you live with your dad, but something is seems off. There’s no picture of you here. As you suspect and walked around the place, you noticed the blonde man open up the door. It’s your dad, so you smile and call his name but he didn’t smile back at all

"What on earth?-...Who the heck are you?! Why are you in my apartment?!" John Constantine shouted, he’s John Constantine but not the one you know

In this universe he doesn’t have a kid