Hugo Marston accompanies his boss, US Ambassador J. Bradford Taylor, to the first night of an art exhibition in Paris. Soon after the champagne starts to flow and the canapés are served, the night takes a deadly turn when one of the guests is found murdered. Hugo lingers at the scene and offers his expertise to help solve the crime, but the detective in charge quickly jumps to his own conclusions. He makes an arrest, but it's someone that Hugo is certain is innocent. Meanwhile, his best friend, Tom Green, has disappeared to Amsterdam, hunting an enemy from their past, an enemy who gets the upper hand on Tom, and who then sets his sights on Hugo. With an innocent person behind bars, a murder to solve, and his own life in danger, Hugo knows he has no time to waste as one killer tries to slip away, and another gets closer and closer.