It was Rebecca.

Sandra had saved her dad, and Rebecca frequently updated Sandra about his health condition.

Oliver had made a full recovery and was due to be discharged from the hospital.

Sandra answered the call.

"Is this Sandra?"

The voice on the other end was unfamiliar, not Rebecca.

"Sandra, please hang up!"

sobs followed, unmistakably Rebecca.

Rebecca must have been kidnapped.

Sandra walked out of the office.

"Who are you?" she ...