When the Ticking Stops (2020)

Detective Arianna Winters goes on a regular call out for a dead body with no external sign of trauma and overhears that the deceased was running from someone called The Ticking Man. She discovers that The Ticking Man has been killing people for centuries, but no one has ever uncovered his true identity. She only knows that if you hear the ticking, he is coming for you; and when the ticking stops, you will die.