Drew's a bit of a loner. She has a pet rat, her dead dad's Book of Lists, an encyclopedic knowledge of cheese from working at her mom's cheese shop, and a crush on Nick, the surf bum who works behind the counter. It's the summer before eighth grade and Drew's days seem like business as usual, until one night after closing time, when she meets a strange boy in the alley named Emmett Crane. Who he is, why he's there, where the cut on his cheek came from, and his bottomless knowledge of rats are all mysteries Drew will untangle as they are drawn closer together, and Drew enters into the first true friendship, and adventure, of her life.