Here's the storyline plucked from LeCarre's website - we'll have to see if the film sticks to the source or whether it's more of an inspiration rather than an adaptation.
“A half-starved young Russian man in a long black overcoat is smuggled into Hamburg at dead of night. He has an improbable amount of cash secreted in a purse round his neck. He is a devout Muslim. Or is he? He says his name is Issa.
Annabel, an idealistic young German civil rights lawyer, determines to save Issa from deportation. Soon her client’s survival becomes more important to her than her own career. In pursuit of Issa’s mysterious past, she confronts the incongruous Tommy Brue, the sixty-year-old scion of Brue Frères, a failing British bank based in Hamburg
Poignant, compassionate, peopled with characters the reader never wants to let go, A Most Wanted Man is alive with humour, yet prickles with tension until the last heart-stopping page. It is also a work of deep humanity, and uncommon relevance to our times."
Annabel (Rachel McAdams) with Issa (Grigorly Dobrigin)
Grigorly Dobrigin plays the young Muslim; gotta say he looks gorgeous.
Here's the international trailer; no US release date, no poster yet. With that, I'll keep you posted.