King Rat. When Singapore surrendered to the Japanese in 1942 the Allied POWs, mostly British but including a few Americans, were incarcerated in Changi prison. This was a POW detention center like no other. There were no walls or barbed-wire fences for the simple reason that there was no place for the prisoners to escape to. Included among the prisoners is the American Cpl. King, a wheeler dealer who has managed to established a pretty good life for himself in the camp.