Chaos seems to follow Danny and Zan.
After narrowly avoiding a sticky end in Los Angeles, they escape to Vietnam to help out an old army mate of Danny's and explore a new TV-writing project. But soon they become entangled in a web of mysteries: their friend is being poisoned, a government official's daughter has disappeared, a mysterious body has been found in a canal, and there's a bloodthirsty sun bear somewhere in the city.
It all seems to revolve around one powerful man, and he has Danny and Zan in his sights. They've got to get on the front foot if they're going to walk out of this mess.
Tunnel Vision sees fever-pitched adventure collide with sharply witty, pacey dialogue as Danny Clay and his (almost) faithful sidekick navigate the corrupt world lurking beneath Saigon's crowded streets.