写一个短故事，其中包括三个人物和一个悬念结局。
Margaret，John，Rebecca。
Margaret, John, and Rebecca were co-workers at a law firm. One day, they were tasked with an important case that could make or break their career. They worked tirelessly for weeks, putting in long hours at the office to prepare for the trial. 

On the day of the trial, Margaret discovered a crucial piece of evidence that could turn the case in their favor. She rushed to tell John and Rebecca, but they were nowhere to be found. She searched the entire building but could not find them. 

As the trial began, Margaret had to present the evidence alone. She was nervous and worried about her missing colleagues, but she managed to present a compelling argument. Just as the judge was about to deliver the verdict, John and Rebecca burst into the courtroom. 

They had been investigating a lead that could strengthen the case even further. With their evidence, the judge ruled in their favor, and they won the case, much to the delight of their clients. 

However, the question remains: where were John and Rebecca before the trial? The mystery lingers, and Margaret cannot help but wonder what they were up to.