When Britt's older brother, Bran, lands a summer job house-sitting for the Marquises, an elderly couple, it seems like a great opportunity. Britt and Bran have moved to Florida so their mother can finish college, and the house-sitting income will allow their mom to quit her job and take classes full-time. Having never lived in a real house before, Britt is thrilled. There's only one problem: Britt starts to suspect her family isn't supposed to be...