“The deceased hired me,”—that was the conclusion private detective Tatyana Ivanova made after reading the letter slipped under her door. Indeed, entrepreneur Ernst Guber was already dead when his lawyer told her some additional details about the future case and the terms for receiving the fee. The first steps of the investigation led Tatyana to a strange conclusion: the murder weapon was an ordinary office chair loaded with a lethal dose of radiation. So the chair is the executioner. But who is the client?