DS Penhaligon tracks a serial rapist who revels in his crimes, but during the course of her investigation she becomes a victim herself, which inevitably changes her relationship with criminal psychologist Fitz.

When his wife returns, his life is thrown into even more chaos.

The police catch Floyd but criminal psychologist Fitz is unable to make a breakthrough before he has to be released due to lack of evidence.

Floyd's audacity grows as he phones Fitz on his radio show asking how a rapist should cover his tracks.

Bill Nash smiles at Stuart Grady, and, in those few seconds, changes the course of their lives and inadvertently turns them both to murder.

Meanwhile, on the domestic front, Judith finally rebels.

Fitz is pitched against Grady and Nash, whose relationship is now spinning dangerously out of control.

While in Hong Kong on a lecture tour, Fitz is asked by the local police to help investigate the murder of a Chinese businessman.