Love is in the air, but what does that mean for Greg Heffley? A Valentine's Day dance at Greg's middle school has turned his world upside down. As Greg desperately tries to find a date, he worries that he will end up alone on this big night. His best friend Rowley also has no prospects, but that's only a small comfort. An unexpected twist brings Greg a dance partner and leaves Rowley feeling like the outsider. However, a lot can happen in one night, and in the end, you never know who will find happiness in love.