Madeline Whittier is allergic to the outside world. So allergic, in fact, that she has never left the house in all of her 17 years. But when Olly moves in next door, and wants to talk to Maddie, tiny holes start to appear in the protective bubble her mother has built around her. Olly writes his IM address on a piece of paper, shows it at her window, and suddenly, a door opens. But does Maddie dare to step outside her comfort zone? Everything, Everything...

The unlikely love story of Maddy, a smart, curious and imaginative eighteen-year-old who due to an illness cannot leave the protection of the hermetically sealed environment within her house, and Olly, the boy next door who won't let that stop them. Maddy is desperate to experience the much more stimulating outside world, and the promise of her first romance.