Dieter is captured and thrown in with other POW's that have been captive for a couple years before Dengler got there. Ostensibly, the rest of the story is their survival and escape.
I found the movie interesting and timely given John McCain's experience as a POW even though I don't think he spent time in a jungle camp like these guys.
Rescue Dawn is an entertaining movie, good enough to rent at least, mostly because it's (based on) a true story.
Or is it?
The family of Dieter Dengler disagrees. They have their own website debunking the authenticity of the producer's version of events depitcted in the movie.
Whether the heroe's welcome at the end is true or not, it was satisfying enough, all told a pretty good film, authentic or not.