Murder 57 -Catherine's Wheel

Catherine Emerson is a pyrotechnician. She has ambitions of winning the International Fireworks world championships but has yet to qualify. This year she has high hopes of a good result, despite her failures in recent years. Tonight is the pre-qualification event dinner and excitement will be building. But did someone sabotage Catherine's attempts last year? Who is the new mystery entrant? And would somebody kill to ensure success?