Doppler.

After the death of his father, Andreas Doppler abandons his home, his family, his career, and the trappings of modern civilization to live in a makeshift tent in the forest. There, he reluctantly adopts an orphaned moose-calf he names Bongo. Or is it Bongo who adopts him? They soon grow to depend on each other in unusual and unexpected ways, and together they devote themselves to the art of survival with some surprising results.