After the USPS creates a penpal pairing program, Elizabeth Mills is encouraged by her friends to sign up and talk to someone new. Spencer Reid, bored with only getting bills and advertisements in his mailbox signs up for a penpal. The two get paired up, and begin writing to each other every week.
19 year old Y/n Y/l/n gets the opportunity to help the FBI's Behavioral Analyst Unit solve a case where the UNSUB fancies college girls.
"I can't wait for you to meet them sis. I know you'll love them as much as I do. Hopefully this month ends soon and I get to see you again. I miss you a lot Mi-Mi and so does mom I put a picture of Agent Gideon and I on my first day of the Bureau and one I took with mom on your birthday. Love you MI-Mi" that was the l...
Rossi and Hotch take in one last kid - Spencer. [Maybe this is important for a few: Ages:Spencer:7, JJ:9, Emily:14, Garcia:15, Derek:17 The rest of the characters are their normal age in this AU.]