They dragged the unidentifiable body of a man out of the Thames: Routine enquiries led nowhere and the case was shelved. Superintendent Harry Lee retired and reopened the case for his own satisfaction. An orthodox approach led nowhere, so Lee tried a few unorthodox methods. That was when he heard the story of the Flying Saucer. Lee was experienced enough to tell a crank from a reliable witness, The Saucer-man was no crank. At last Lee saw the disc-ship for himself and met its pilot. He went aboard and took a trip to the unknown. Apparently the saucer-pilot was working on the same case from a different angle and Lee realised why it had been impossible to identify the body . . . it didn’t belong. There were some more disappearances to account for . . .