The reason he had become a private investigator

He had a filing cabinet dedicated to this case.
His high school girlfriend Terra had disappeared from her school 10 years ago and never reappeard.
Going back to this case was his private obsession. Over the years he discovered that at least one girl disappeared every year from Saint Agnes Girl's Prepatory School. They were all accounted for as run-aways but his findings did not reflect that.
Dennis knew that with this medallion he could finally infiltrate and perhaps find out what had occurred.
All of the girls had physical traits in common and excelled in the fields of science.
He knew they all had shoulder length red hair, green eyes, were 5'2.
If clothing was all that was needed he still had a pair of Terra's underwear.
He spent the next week preparing. He created papers for an identity. She would be his daughter with Terra that way he could be his own father so she could come home alone. He created a teenage girl's bedroom in his apartment and built an entire history. He bought her a cute little car to drive to school in.
Finally feeling prepared and with the start date of enrollment the next day Dennis gathered the items for transformation in his new bedroom. He took a look at a photo of himself with Terra and kissed her image. "I will find out what happened to you."
He closed his eyes and started the transformation.