Things have been pretty hectic for Dr Siri. Now he's off on what he calls a 'therapeutic holiday' in the mountains with his wife and friends. But sadly there's no rest for the wicked - with the help of a little blackmail they are accompanying an American MIA team. Their mission is to discover what happened to a stoned airman downed ten years earlier. Could he have survived? Who is eliminating the last people to have seen him alive? And who, we ask, is lighting the fires that are shrouding the Friendship Hotel in smog? In the remote Plain of Jars, surrounded by a thousand tons of unexploded bombs, Siri and the morgue team have to discover who is the killer in their midst before they too become victims.