Lucas answered the phone. A moment later, his expression changed. "What? Uncle Smith has gone missing?"

"Yes. As you know, your Uncle Smith has always asked his patients to come to the clinic to see him, but today, he called me and said that he needed to go somewhere to examine a patient. He said it might take a while and told me not to worry. But when I tried calling him afterwards, I couldn't get through," Mrs. Smith anxiously told Lucas what happened.

Because Mr. Smith and Lucas had a grea