On a tiny island off the coast of Louisiana there is a strange 30-meter stone tower. On the seventh and top floor, on August 15, 1986, a very famous man, a member of the richest clan in America, was found dead. He... choked on sea water. The eyes that almost fell out of their sockets testified that at the moment of death the deceased experienced a terrible fright. And the body remained in such a position, as if he was swimming with all his might in a crawl. The entrance to the tower was closed by a massive, tight-fitting safe door, locked from the inside. No one could have gotten into the remote building any other way. In addition, several people continuously watched the tower and the surrounding area from morning to evening and did not notice anything suspicious. Yes, and the weather was clear. There is no one in America who could solve the mystery of this impossible, supernatural death. But on the other side of the Pacific Ocean lives the brilliant detective Kissi Mitarai, who can find the answer in a few days...