Sherlock and Doctor Watson are back and investigate the curious disappearance of an exceptional diamond in a hotel room. A theater adaptation of one of the 56 short stories featuring the detective Sherlock Holmes.

A lonely bank clark discovers a mysterious stain on his bedroom wall, which the local religious community considers to be an apparition of the Virgin Mary. His life turns upside down as he is forced to open his doors to believers of all kinds, who search for higher meaning in the alleged apparition.