Set against the backdrop of the 7th July 2005 bombings, London River tells the story of a friendship which develops between two seemingly unconnected people – Elizabeth (Brenda Bleythn) and Ousmane (Sotigui Kouyate). Both of them have come to London to search for their children who are missing in the aftermath of the bombings.

Although they come from different religious backgrounds – Ousmane is an African Muslim living in France and Elizabeth is a white Christian living in Guernsey, they share the same hope of finding their children alive. Putting aside their cultural differences, they give each other the strength to continue the search and maintain their faith in humanity.