What is the main conflict in The Foreigner by Larry Shue?

It is a stormy night in spring as two Englishmen, Staff Sergeant "Froggy" LeSueur and his friend Charlie Baker, enter the log cabin fishing lodge owned and operated by Betty Meeks in Tilghman County, Georgia, two hours South of Atlanta. Every year, Froggy serves as a weekend demolition instructor for the American army, and this year he has brought his shy and sad friend, Charlie, to America in an attempt to cheer him up. Back in England, Charlie's wife is apparently dying.