As the August Bank Holiday weekend away continues for the couples, the oppressive heat only serves to heighten the growing tension and creeping sense of unease. The peace is further shattered by the arrival of Daisy’s colleague Milo whom Ian views with intense jealousy. The rivalry between Ian and Ollie grows even stronger when Ollie suggests round two of their highly competitive ‘tri-althlon’ - tennis... That night, fuelled by alcohol and highly provocative conversation the dynamic shifts dangerously between the two men with shocking (and we're guessing slightly homoerotic) consequences.