When naive teenager, Mackenzie, escapes her troubled childhood by marrying Richard, she is unaware that she has fallen over the edge of an emotional precipice. Having swapped one miserable existence for another, Mackenzie soon finds the middle-class life she coveted rapidly heading out of control. And then there is Katrina, the elusive and irreverent friend, appearing in Mackenzie's life uninvited and always leaving behind a trail of emotional debris. Spanning four decades, this disturbing story of loss, love and the fragility of mind takes the reader on a psychological marathon as Mackenzie struggles to unravel the blurred boundaries between reality and delusion