A startling premonition sparks a deadly mystery that only Poirot could solve as the star detective and his trusted assistant Hastings set out for Lake Windermere to witness an attempt at creating a world speedboat-racing record. Though Hastings friend Charles appears set to break the current record, the lively celebration soon takes an ominous turn when two sisters inform Poirot of a dark premonition concerning Charles and his Aunt Emily. When the premonition becomes a tragic reality, a single, silent witness provides the only hope for solving the deadly mystery. ~ Jason Buchanan, All Movie Guide