Then, how does he know about her whereabouts?
As Katrina frets, she suddenly remembers the day before when she opened the back cover of her phone after it accidentally fell into the water. She saw a tiny chip inside her phone.
Maybe it's not actually a part of the phone. It's probably used to track her location at any time.
Aaron gave her a phone, which must have a location-tracking system. This is why he makes her carry it with her everywhere. In addition to being able to get in touch with her at any time, he can also be privy to her whereabouts.
At the realization, Katrina's breath stops, and she freezes.
That means...
Even before she goes abroad, she would already be found.
Katrina holds the phone like a lifeline. She's at a complete loss with what to do.
Does she throw away the phone and keep running?
No, she can't risk it.
