Charade
Charade is that rare movie that combines suspense, thriller, romance and comedy.1 The movie stars Audrey Hepburn and Cary Grant. Regina (Hepburn) comes home from vacation to see that her husband has been killed. Also all they money they have has been turned into cash. But all the money is gone.
It seems that the US government wants that money returned to them. Eventually she meets Cary Grants character. But he seems to be up to something.
Also up to no good are her husbands old partners in crime. Everyone thinks that Regina knows where the money is. Regina has no idea about the money or who is friend or foe.
This movie came out in 1963. It was remade in 2002 with Thandie Newton and Mark Wahlberg.