Presunto

During a murder hunt game at a country house, to which Hercule Poirot is invited as an "expert", a real murder occurs.

After an innocent man is executed in a case he was responsible for, a Scotland Yard superintendent finds himself investigating the murder of his key witness.

Megan Carter is a reporter duped into running an untrue story on Michael Gallagher, a suspected racketeer. He has an alibi for the time his crime was allegedly committed—but it involves an innocent party. When he tells Carter the truth and the newspaper runs it, tragedy follows, forcing Carter to face up to the responsibilities of her job when she is confronted by Gallagher.

Inspector Amaia Salazar must return to the Baztan valley in order to solve a series of suicides that seem to follow a similar pattern.