When Britt's older brother, Bran, lands a summer job house-sitting in Florida, it seems like a great opportunity. Britt's family has just recently moved to Florida, and could use the extra money while her mom finishes college. There's only one problem: Britt starts to suspect her family isn't supposed to be there.

Britt starts poking around, and makes a startling discovery -- the owners of the house aren't who Bran says they are. So whose house are they living in, and why has Bran brought them there?