The fashionable and affluent in the French Riviera city of Nice now have a baffling new problem: random assassination. While the Mystery Object television show is in town, being shot in a public square, a shocking mystery unfolds at the feet of the irascible, steely Inspector Carella. As general panic mounts and national attention focuses in, someone with a high-powered rifle keeps deftly executing seemingly unconnected people in broad daylight. Ignoring the meddling of his superiors, Carella desperately pushes his team harder, despite some of Nice's most formidable citizens flatly refusing to talk. Something has to connect the victims, but what could it be?