Fate and Determinism

The plot is driven by seemingly inevitable events, such as the timed appearance of letters and the villain's preordained murders, suggesting a deterministic force that the characters must navigate or defy.

Fauville's premonition of doom and the inevitability of the murders despite precautions.

The impending explosion at a fixed hour and Perenna's helplessness in his prison underscore a sense of inescapable fate.

Don Luis feels events are inevitable, moving from A to D, yet struggles against the possibility of Florence's death.