When you live above the family business, it's hard leaving work behind. And when that business is a private investigations firm, it's easy to understand the Spellman family motto: "Surveillance starts at home." There's even an interrogation room in the basement of their San Francisco Victorian. Now 28, Izzy Spellman began her detective training at the ripe old age of 12, starting with the garbage detail, then graduating to background checks, trailing suspects and stakeouts. Her 21st birthday was spent taking her licensing exam. But now Izzy has found a definite drawback to having parents who are private eyes -- they've intruded on her life too many times to count. They've even hired her 14-year-old sister, Rae, to spy on her. When Izzy demands her freedom, her parents agree on one condition: She must work one last case. The task, a missing-person case more than a decade old, seems doomed to failure. But when Izzy is called off the hunt, she digs in her heels and continues the search. Then her little sister goes missing. Has Rae chosen the wrong people for surveillance practice? Or has Izzy's investigation stirred up a hornet's nest? "The Spellman Files" marks the debut of Lisa Lutz, whose prior claim to fame is writing the screenplay -- and 25 revisions -- for "Plan B," a Diane Keaton movie that went almost directly to . Even Lutz doesn't recommend watching it. Although "The Spellman Files" has been optioned by Paramount Pictures, Lutz insists she will have nothing to do with the production, and instead is working on more books about this dysfunctional family of private eyes.