Kinsey Millhone, employed by Nord Lafferty to drive his daughter home from her incarceration at the Californian Institute for Women, marvels at the simplicity of the task. But Reba Lafferty emerges feisty and rebellious, and Kinsey is soon fighting to prevent her charge from breaking the conditions of her parole.

As she finds herself befriending the ex-gambler, ex-alcoholic and ex-con, Kinsey discovers that Reba had taken the fall for her boss, also her lover, when he conducted a highly-crafted money laundering scam. Alan Beckwith has so far escaped the clutches of the FBI. Now they believe he is laundering money for a Columbian drug cartel - they just need the proof.

When Kinsey is asked by the police to persuade Reba to unveil crucial evidence guaranteed to put Beckwith behind bars, she doesn't expect cooperation. But when she hears of shocking new information about her lover, Reba is suddenly all too eager to do everything she can to ruin him.

Embroiled in a cunning challenge of wits, and meanwhile bemused by her own blossoming romance, Kinsey must try to control the bitter, angry Reba as she launches her dangerous revenge . . .