Lissa and Kate were inseparable best friends until the party where Kate got drunk and they kissed out in a gazebo, and Lissa (who wasn't drunk) realized that she liked it. Beyond the awkwardness of confronting what they did and what it meant, Lissa now comes to terms with who she is and who she wants to be, along with some help from her boss and a social outcast Ariel (who cares more about Lissa's "lucid dreams" than her sexual orientation).
It's a gentle teen story of awakening ideas, with only the slightest intimation of sex. Mostly, in fact, the story is the old chestnut about learning to be true to yourself, and what the real definition of friendship is (tossed in with some familiar cliches about obnoxious little sisters and clueless boys). I give the book high marks for its sensitive depiction of teen homosexuality, but only a moderate review for its otherwise fairly unoriginal storyline.