Jillian is new to New York, her mom just married some rich guy with two kids, and she doesn’t like her new stepsister. (The stepbrother is mentioned once and then never again.) But through a cat-sitting job in an old lady’s penthouse, she discovers the location of a kidnapped boy, and she has to get help to rescue him.

The story is compelling and written well, not lagging a bit, but I didn’t like how the kids decided they had to rescue the victim themselves. It’s very unlikely.