Peter Kuban, a Hungarian refugee, is about to be deported after jumping ship in New York harbor. He needs to find an ex-G.I. named Tom whom he helped during the war, as Tom can prove Peter's right to legal entry into the United States. If he can't find Tom within 24 hours and prove his case, he will be branded a fugitive and will be permanently disqualified for U.S. citizenship.

To make an honest woman of his pregnant sister, Rosalie, callous New York mobster Phil Regal intimidates witnesses and bribes a store clerk to get Rosalie’s condemned boyfriend, Nicky Bradna, out of prison. But Regal’s meddling deeds soon backfire.

The dream is unusually vivid: Bank employee Vince Grayson finds himself murdering a man in a sinister octagonal-shaped room lined with mirrors while a mysterious woman breaks into a safe. It is so vivid that Vince suspects it may have really happened. To get the dream off his mind, he goes on a picnic with some relatives. When a thunderstorm forces his party into a nearby mansion, Vince discovers that the bizarre room does exist, and it means nothing but trouble.