Zoey returned home, and she's lucky that she managed to hide a spare key from under her mattress. As she goes inside, she went to the bathroom to wash her face. She may not see her own face, but at least she can see water particles that are on her face briefly before they disappeared. Walking to her own bedroom, she stared at the mirror, not being able to see herself, but at least she's able to hide herself at her own home.
"What should I do next?" she paced around the room.
Staring at her empty reflection, it's obvious that she is nowhere to be found. At least she manages to get home so that she can stay hidden until she can go back to Shelly's lab by tomorrow morning at 8:30 AM.
She needs to keep herself busy.