Abigail and Lucy

So the little girl is Lucy, and the other girl is Abigail, you both are siblings, and you Abigail, take care of Lucy. But then one night, you hear crying in her room when you go to see if she's OK, and you'll see that she's not there and that her window was open. And you start to freak out so you get your gun, your stuff, your weapons to keep yourself safe, to find Lucy, you will do your very best to find Lucy