"My name is Julia. I don't know if you know who I am, but... I'm outside your house." 

That's how Julia introduced herself to her half-sister's mom after parking outside their Toronto home with zero warning. 

Growing up on opposite sides of the world, Julia and Kat only knew about each other in fragments. A photo on the wall, a gift sent years ago, whispers of "you have a sister somewhere." 

But when Julia finally worked up the courage to knock on that door, what she found wasn't the fairy tale reunion she'd imagined. 

The sisters share how they met, lost each other, and found their way back. They explain how and why sometimes family is something you have to choose twice.