Book Four is the final book in the series about two people, Mac Smith and Carice Offstrop, who have set up an Inquiry Agency together in Auckland, New Zealand. Mac and his wife Deborah, who is pregnant with her first child, have been married for just over a year and Carice is engaged to Desmond who manages a hotel in Auckland.
Their office is located above The Moray Restaurant which is situated in the business centre of Auckland and living in an attic bedroom above the office, with his dog Holborn, is Professor Tymn, who lectures at Auckland University.
Mac and Deborah have become friends with a couple named Caspar and Phoebe who own a farm near Auckland and who have involved them in their search for a lost gold mine in South Island which they believe is located in Skippers Canyon.
Whilst solving their unusual cases, Mac has been re-united with an old friend from Military Intelligence, who continually lures him back into the world of espionage, intrigue and betrayal where his life is often at risk.
This exciting finale contains several twist that not even the author saw coming and will keep you reading late into the night.