It’s an elegantly pleasurable period thriller, a film of tidy precision and class.

Best known as the screenwriter of such subtext-rich adaptations as “The Wings of the Dove” and “Drive,” Amini excels at conveying the subtle, unspoken tensions between characters, selecting a tightrope-risky example with which to make his directorial debut and orchestrating it with aplomb.

A superior directorial debut for a smart, literate screenwriter delivers both first-class character drama and edge-of-your-seat suspense.

Dunst handles her sidekick role with a mature ease that’s new to her, but it’s the men you remember: Mortensen in psychological freefall and Isaac always tough to read and hiding something behind a handsome, controlled exterior. It’s a gentle and smart blast from the past.

On his first trip behind the camera, the British-Iranian Amini shows his skill at working with actors and sensing the way they can fill out literary characters. His screenplay generally feels more naturalistic than Highsmith, the dialogue less spare.