Bree Apollo is an average fifteen-year-old girl: she loves chocolate, baking cupcakes, and her neighbor, the hunky and all around popular seventeen-year-old Foster Quinn. Except Foster is clueless about her feelings for him, instead treating her like a kid sister and begging for her homemade desserts. As a fellow chocolate lover, he should be Bree's for the taking, if it weren't for his oh-so-perfect girlfriend.

After she overhears Foster making fun of her to his friends, she's devastated. And not even chocolate can take away the pain. She intends to wallow in grief for a boy that was never hers to begin with, but Austen, her eccentric new neighbor has other ideas.

The strange boy down the street always wears a black fedora, walks barefoot, and focuses all his energy on building a treehouse in his backyard. For some reason, he's elected Bree to help him. At first, she turns him down because he acts too awkward and takes everything she says literally. But after learning of his autism, she decides to help with his construction (forgiving him for not being a chocolate fan), even though she doesn't know a think about power tools.

As Bree and Austen grow closer, Foster notices Bree no longer worships the ground he walks on. He wants her to go back to that doting version of Bree, but Austen has become more important to her than she's ready to admit.

Austen may just be the one to help her move on from Foster.

Like two pieces of a puzzle, they fit together perfectly.