The Mechanic, a self-proclaimed 'calcinhazl' connoisseur, finds himself in a gay cinema, his eyes drawn to a lone green thread on the floor. Following it, he discovers Flavia, a married man, eagerly jacking off in the shadows. The Mechanic, unable to resist the allure of the green thread and Flavia's hungry stare, joins in. Their moans fill the silent theatre as they indulge in their taboo cinema tryst, the green thread a constant reminder of their shared lust.