It was a sunny day at Oakwood Elementary when the principal, Ms. Wilkins, discovered that her office key had gone missing. She searched high and low, but the key was nowhere to be found. The students were all buzzing with excitement, wondering who could have taken it.

Samantha, a curious and observant fourth-grader, decided to investigate. She gathered her friends, Jack and Liam, and they began searching for clues. They scoured the hallways, peeked into classrooms, and even checked the lost and found bin, but there was no sign of the missing key.

Just as they were about to give up, Samantha noticed a small piece of paper on the floor near the principal's office. It was a note that read, "I have the key, and I'm not giving it back." The three friends knew they had to find out who had written the note and why they had taken the key.

With determination, they started interviewing their classmates, asking if anyone had seen or heard anything suspicious. After a while, they stumbled upon a lead. One of the students, a notorious prankster named Tyler, had been acting strangely all day.

Samantha, Jack, and Liam confronted Tyler, and he reluctantly admitted to taking the key as a prank. He said he didn't mean any harm, he just wanted to see the look on Ms. Wilkins' face when she couldn't find it. The three friends scolded Tyler and convinced him to return the key before he got into serious trouble.

In the end, the case of the vanishing key was solved, and Ms. Wilkins was relieved to have her key back. Samantha, Jack, and Liam were proud of themselves for using their detective skills to uncover the truth and prevent a bigger problem. From that day on, they became known as the "Mystery Solvers" at Oakwood Elementary.