Dell Woods, a retired American Missionary who spent his life in Japan, sneaks away from California where he lives with his badly incapacitated wife, Daisy, to complete a final mission of faith in Japan. His elder daughter, Braegen, is horrified as she knows her parents are barely coping with daily life, much less international travel. She alerts her brother Bud, who lives in New Zealand. They meet in Tokyo to plan a 'sensible' future for their zealous parents but Dell’s final mission to the banks of the Toyama River, changes the game plan for everybody.