This movie is great! *MAJOR SPOILERS ENDING REVEALED*

Very suspenseful. I was immediately caught up in Ellen's dilemma. Her abusive husband George is bed-ridden, recovering from a heart attack. He suspects Ellen of having an affair with his doctor, who is an old flame of hers. George writes a letter to the district attorney, outlining his suspicions that his wife and doctor are trying to murder him by giving him an overdose of his heart medication. He gives Ellen the letter to mail, not telling her what's in it. She gives it to the postman, who is a complaining old man. Then George tells Ellen what he's done, and says he's decided to shoot her. He produces a gun but drops dead of another heart attack before he can fire it.

Ellen's in shock, but realizes she has to get that letter back! She chases down the postman and begs him to return ot, but he refuses because it was written by her husband and not her. Ellen begs, but the postman tells her it's more than his job is worth to return the letter to her. Finally he tells her if she goes to his supervisor at the post office later in the day, she may be able to get the letter back.

Ellen returns home and has to deal with suspicious neighbors (who wonder why she's so agitated) and her husband's aunt, who pays an unexpected call. George is lying dead upstairs while Ellen makes nervous small talk with the aunt, telling her that George is asleep and cannot be disturbed.

At the post office, the postmaster is instantly suspicious of Ellen's story that her husband wants the letter back, especially since it's addressed to the district attorney. Ultimately Ellen leaves the office without the letter.

The doctor comes by, and Ellen breaks down and tells him everything. He assures her that an autopsy will reveal the cause of George's death as another heart attack, but Ellen is sure they'll be arrested. Just then the doorbell rings and it's the hateful old postman, who promptly hands Ellen the letter. The reason? Insufficient postage!! He tells Ellen to put another stamp on it and he'll take it, but needless to say, Ellen's not letting the letter out of her sight. So it ends well.