When Britain’s leading fisheries expert (Ewan McGregor) is approached by a consultant (Emily Blunt) to help realize a sheik’s (Amr Waked) vision of bringing the sport of fly-fishing to the desert, he immediately thinks the project is both absurd and unachievable. But when the Prime Minister’s overzealous secretary (Kirstin Scott Thomas) latches on to it as a “good will” story, this unlikely team will put it all on the line and embark on an upstream journey of faith and fish to prove the impossible, possible.