On a sweltering summer day, a group of straight men, lured by the promise of easy cash, board a bus for an "exercise" they'll never forget. The driver, a charismatic gay man, wastes no time in propositioning them, offering cold hard cash for their hard, uncut cocks. As the bus rolls on, the men strip naked, their initial hesitation replaced by a growing eagerness to explore their latent desires. One by one, they take turns getting fucked hard and deep in the anal, their moans of pleasure echoing through the bus as they learn the true meaning of gay sex.