Johnny Wise came to London from Malaya in 1940, met a girl and, when she was unfaithful to him, committed suicide. Retribution came in 1947, catching up with the principals in Johnny Wise’s death in the course of an Exhibition’s pageant.

Which of the eleven visored knights killed the maiden in the tower—and how? Inspector Cockrill is baffled. And his task is not made any easier because all the suspects were anonymous in their suits of armour at the time of the murder…