Katie is a normal girl, goes to a normal school, and leads a mostly normal life. When her senior year begins, she is faced with the most significant and interesting project ever. Her teacher assigns each student a pen pal, who they must write to all year, and then are to be introduced to at the end of the school year. Katie becomes extremely close to her pal, but the secret guy she's communicating with may be closer to her than she thinks, with her mom getting remarried to Brian Gomez, Selena Gomez's father.