On a night filled with strange events, a masquerade ball was held at the Colosseum, where members of high society gathered, including the young Lord Cronshaw and the famous actress Coco Courtenay. But amidst the dancing and music, something unnatural hung in the air, something that foreshadowed disaster. While everyone was immersed in the festivities, a silent observer watched, and mystery enveloped everything.

That night, Lord Cronshaw was killed in a mysterious accident, shattering all expectations and raising questions about what had happened. Was it a deliberate murder or an accident? Was Coco Courtenay's death a mere coincidence or part of a larger plot?

Poirot, the brilliant detective, begins investigating a case that doesn't appear to be a simple crime. With clues leading nowhere and a cascade of contradictory evidence, the truth becomes increasingly elusive. Between betrayal, hidden motives, and unexpected twists, Poirot finds himself immersed in a world of puzzles that grow more complex with every turn. It is a novel that blends suspense and intrigue, and demonstrates the author's skill in constructing events full of mystery, and presenting characters full of strangeness that leave the reader in a state of anticipation until the end.