勇闯鬼门关 Run a Crooked Mile

A man witnesses a murder in a secluded mansion. When he reports it, there's no evidence of the murder, or that anyone was there. He finds a key on the floor and goes to his boss to get help when he's struck from behind. He wakes up in a hospital room after a polo accident to find he's had amnesia for two years, is now married, and living in Switzerland. He still has the key and...