"When thirty-somethings Cassie and James find each other on a home swap website, it feels meant to be. City hotshot James needs a bolthole after a relationship goes sour and Cassie needs to leave the comfort of her little island to research her new book. Soon, James is living in Cassie's cute but ramshackle house, and Cassie's living in James's super smart London penthouse. It's the perfect solution. Except it turns out it's difficult to switch homes without getting involved in each other's lives. Cassie's unimpressed when James's ex turns up, and James is furious when he discovers that he's going to have to help organize Cassie's neighbor's eightieth birthday party. But as the insults fly so do the sparks, and when the time finally comes to swap back, Cassie and James find they aren't quite ready to give each other up, until a shocking discovery brings the pair crashing back to reality and forces them to decide what life they really want"