Fact1: Art critic and forgery expert George Steele is stopped by policeman, Fact2: Steele while having drink with receives urgent telephone call informing him that mother has been taken to hospital girlfriend and magazine writer Terry Cordell, Fact3: Anxious to avoid Barton pleads with Cochrane not to arrest man, Fact4: ship 's crew arrive to put out fire followed by Traybin and Cochcrane, Fact5: Terry and Steele are taken to estate of Lowell
Output: Art critic and forgery expert George Steele OBrien is stopped by a policeman as he breaks into the Manhattan Museum. He claims that he was in a train wreck. Police Lieutenant Cochrane Wallace Ford, however, finds that there has been no recent wreck. Steele, unsure himself what happened, relates the bizarre events leading up to the present. A flashback ensues: Museum director Barton Erskine Sanford reprimands staff member Steele over the sensational style of his public lectures and is annoyed that he wants to demonstrate a forgery detection method by Xraying a masterpiece that was recently exhibited, Durers Adoration of the Kings. Afterward, while having a drink with girlfriend and magazine writer Terry Cordell Trevor, Steele receives an urgent telephone call informing him that his mother has been taken to a hospital. He rushes to Grand Central Station and catches the last train. About forty minutes later, Steele watches helplessly as another train crashes head on with his. Cochrane reveals that Steeles mother was never taken to the hospital. Anxious to avoid a scandal, Barton pleads with Cochrane not to arrest the man. Stevenson, the curator and Steeles friend, and Dr. Lowell Ray Collins, a member of the museums board of directors, vouch for Steeles character. In private, Traybin Marshall, an art expert with Scotland Yard investigating the suspicious loss of a Gainsborough painting, tells Cochrane he wants Steele freed, with detectives discreetly following him, as he is uncertain if Steele is involved. Steele is released but is fired by Barton at the direction of the museum board because of his alleged mental instability. Steele sets out the reenact the train ride, hoping to gain some clue of what is going on. He finds out that a drunk was taken off at the next station by two men and believes the supposed drunk was actually himself. He informs Stevenson of his discovery. Steele begins to suspect that the Gainsborough supposedly lost in a fire at sea was actually a fake. Later, Stevenson calls Steele to tell him he has discovered that the fire was not an accident and to meet him in the museum vault that night. When Steele arrives, however, he finds Stevenson dead. Seen standing over the body by an employee, he flees. Although both Traybin and Terry plead with him to turn himself in, Steele is determined to exonerate himself. He coerces Barton to meet him and confirms that the Gainsborough lost was indeed a forgery and was destroyed to conceal the existence and theft of the original. Steele follows Barton to a party given by a museum board member, where he learns by eavesdropping from the fire escape that the shipment of the Durer painting to London has been unexpectedly advanced. Steele sneaks aboard the ship where he finds a fire burning in the bonded cargo hold. He removes the painting from its frame to save it, only to discover he has been locked in. The ships crew arrive to put out the fire, followed by Traybin and Cochcrane, who spots Steele. Steele escapes with the painting from the ship by shinnying down the hawser mooring the ship to the dock, where Terry picks him up in her car. Terry persuades Mary, Bartons secretary, to arrange for Steele to Xray the painting, which he confirms is a copy. However, as he, Terry and Mary are leaving, he is knocked out and Mary pulls a gun on Terry. Terry and the punchy Steele are taken to the estate of Dr. Lowell, who is behind the thefts and forgeries. He explains to Terry that, as a frustrated art lover, he could never have acquired such fabulous works legitimately. Before killing them as the only witnesses to his scheme, Lowell uses narcosynthesis on Steele to assure himself that Steele did not tell the police, the technique he also used to make Steele believe he was in a train wreck. Lowell waits for a passing scheduled train to mask the sound of gunshots, but Traybin and Cochrane intervene, shooting Lowell just before he can kill Steele. Traybin had been waiting outside the entire time, waiting to determine where the stolen art is concealed. To save herself from being charged as an accessory to Stevensons murder, Mary shows them the location.