Blackout

An American in London, down on his luck, runs into a beautiful blonde in a bar who offers him a lot of money to marry her. Broke and unemployed, he takes her up on it. When he wakes up the next day, he finds himself in a strange room that turns out to be an artist's studio, there is blood on his coat, and he discovers that his new "wife's" father had been murdered the night before. (imdb)