Scotsman Donald Mackenzie was hunting for the remains of Noah's ark on Mount Ararat in Turkey when he vanished. His family has heard nothing since and several searches by Turkish authorities have failed to find any trace of him. His younger brother Derick, a widowed father of five, travels from Stornoway, Isle of Lewis, across Europe to Dogubayazit, a Kurdish town at the foot of Mount Ararat. The film follows Derick on his journey as he meets many of those who knew his brother who have their own ideas about what might have happened to him. Donald could have fallen or succumbed to the extreme weather. He could have been attacked by wild animals, robbed by bandits, or crossed the paths of the Turkish army or the Kurdish separatists, who both operate on the mountain. He could also have been targeted because of his Christian beliefs or by rogue guides keen to exploit the story of the Ark. Derick goes in search of answers, but in whom can he trust and how close will he come to the truth? The film is a moving story of kinship, friendship, trust and coming to terms with loss.