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A man in search of his son.
An agent on the run from his past.
A country on the verge of revolution...

Nothing good ever comes from a midnight phone call, especially from Downing Street. For washed-up spy Harry Tower, it is the worst news at the worst possible time. His son, Sean, has gone missing in troubled Iran after writing an exposé about government corruption.

Their relationship has never recovered since Harry's wife's suicide, for which Sean holds his father responsible. And Harry, with his career on the verge of disintegration, needs to find him and put things right.

When Harry arrives in Tehran, he finds a city on the cusp of revolution. Foreign powers are jockeying for influence, money and, most importantly, oil. The CIA are conspiring to undermine the government with an impending coup, and there are dark mutterings about opium smuggling. But the reasons for Sean's disappearance may be even more sinister than Harry first suspected.

Before long, he is on the run—not only from a faceless enemy, but from his own past. Which will catch up with him first?

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