In an Italian village, two woodcarvers plot to create a wooden Madonna who weeps tears of camphor, ether, and water. But when a lonely child (their daughter / niece) confides in the Madonna, she begins to weep real tears, setting off recriminations and misunderstandings with the local policemen, representative of the church, and a chemical analyst.
For a review of the play, see 'A Religious Comedy on B.B.C. Television', The Times, 9 January 1956, p.5.