Dial M for Murder centers on Tony Wendice, a charming but calculating former tennis pro who plots to have his wealthy wife, Margot, murdered after discovering her past affair. Motivated by jealousy and greed, Tony meticulously arranges the perfect crime, blackmailing an old acquaintance into carrying out the killing.

But when the plan goes wrong and Margot survives, Tony quickly shifts strategies—manipulating evidence and testimony to frame her for murder instead. As the police investigate, the truth begins to surface through small inconsistencies and clever detective work. The suspense builds as Tony’s precision unravels and Margot’s fate hangs in the balance.