Then, the other end hung up.

She called back again, but it was a dead number.

As she walked, Sarah searched for the storage card in her bag. She couldn't find it anywhere. When she returned to the office and found every corner, she still didn't find it.

She recalled her experience in the hospital today, "Oh, no, I must have lost it at that time!"

Sarah dialed Brandon to ask a favor.

"I'm going to have an operation soon. I'll go to search after the operation. If ...