As a Division I basketball player and co-parent to his chronically ill little sister Lee, Tim Dexter isn't your average college kid. With an enormous amount of responsibility on his shoulders, TD's only true escape is his adventurous, gorgeous, and mysteriously named friend, Emma Rey Finley. From their first day of college, Emm brings a much-needed, addictively playful sense of mystery and excitement into TD's life. Whether they were texting in coded messages, going on "missions" to find the best ice cream in town, or finding a way to put a smile on Lee's face, TD believes his unique bond with Emm to be both ethereal and eternal. When, in the summer before their senior year, Emm invites TD to spend ten days with her in Europe, he finds himself on the greatest adventure imaginable. Lost in a whirlwind of freedom and whimsy, TD soon realizes that his feelings for Emm aren't merely about friendship, yet he's hesitant to risk their extraordinary bond. As their senior year begins, things start to change between TD and Emm. Afraid of losing her forever-and amid the most important season of his athletic career-TD spends months devising a plan to confess his feelings. But just when he's ready to proclaim his love to his best friend, the unthinkable happens.