Kenneth’s birthday was coming. Because he likes to watch action movies, he invited his friends to watch a movie together that day. They planned (计划) to meet at 5 pm outside the theater. He reached the theater 30 minutes before 5. He waited for his friends outside. Twenty minutes passed. His friends didn’t show up. He called one of them. His phone call went straight to voicemail (语音信箱). He wondered (想知道) what had happened and where his friends were.