Our Kind of Traitor

As part of a plan to launder billions of dollars in London, "the Prince" – the head of the Russian Mafia – creates a new bank and has its financial oligarchs sign over their accounts to him. The first oligarch to do so is murdered alongside his family by a blue-eyed assassin. Poetics lecturer Perry MacKendrick and his barrister wife Gail are on a holiday in Morocco to try and salvage their marriage after Perry slept with one of his students. Perry strikes up a friendship with Dima, a hearty and boisterous Russian with an eidetic memory. The two men bond over drinks and tennis before Dima invites both MacKendricks to his daughter's birthday. At the birthday party, Dima gets Perry alone and gives him a USB stick that links corrupt British politicians and businessmen to the Russian mafia. He fears for his life after hearing of his fellow oligarch's fate, and pleads with Perry to turn the USB stick over to British MI6 when he returns to London. Read more on Wikipedia.