I love Highsmith so much . . . What a revelation her writing is (Gillian Flynn)

'Ramón had done it. Obviously! He thought about Ramón, his Catholic soul trapped in his passion for Lelia. He'd find Ramón and see that he paid with his life for what he had done.'

Mild-mannered Theo is a wealthy German expatriate; hot-tempered Ramón was born into poverty in Mexico City. The two men are unlikely friends - especially as they are in love with the same woman. When Lelia is found brutally murdered, both lovers are suspects - and each suspects the other. But then they discover that a thief was seen at Lelia's apartment, and their hunt leads them on a frantic chase to sun-drenched Acapulco. Theo begins to get the uneasy feeling that his every move is being watched.