In 1963, Ennis Del Mar (Heath Ledger) and Jack Twist (Jake Gyllenhaal) are hired by Joe Aguirre (Randy Quaid). They need to look after his sheep up in Brokeback Mountain for the summer. One night, Jack makes a move on Ennis and the two men end up having sex. Soon an emotional relationship develops. Before leaving at the end of the summer they have a fight.