What is the main conflict in Moccasin Trail by Eloise Jarvis McGraw?

Jim is attacked by a grizzly bear and the other whites leave him behind. Jim manages to kill the grizzly but is seriously wounded. He is taken in by a group of Indians and nursed back to health. By the time he is well, he has been accepted into the tribe and he soon finds himself adapting to the lifestyle. This will take on a cultural conflict later on.