The spell of the ancient Maori. The last curtain

Inspector Roderik Alleyn-aristocrat, intellectual and the best detective Scotland Yard-came to relax at the quiet New Zealand resort incognito. Roderic in New Zealand.
However, a peaceful rest of a foreign guest did not set. One of the inhabitants of the resort mysteriously disappears, and the next day his body is found in a hot volcanic lake.
What is this: an accident, murder or Maori"s spell, which dominates the resort? The next in the list of victims?
Young talented artist Troy, the wife of the inspector Scotland-Yard Roderick Alleyn, knew very well what gossip went about the famous theater actor Sir Henry Ankrede, whose portrait she was going to write. But to die under mysterious circumstances immediately after the ceremonial dinner is perhaps too extravagant even for the genius of the stage.
Troy is completely sure: there was a murder. But which of the many members of the troupe of Sir Henry is a killer? Indeed, in essence, all those present was motive to get rid of it. And the ability to commit a crime too!
alone cannot cope. And then she has to call on to help her husband and conduct an investigation with him