As the sun sets over the colorful houses of Guanajuato, an illicit rendezvous begins. The married couples, strangers until now, share a bottle of tequila, their inhibitions melting away like the ice in their glasses. The women, their skin glistening with sweat, lean in close, their hands brushing against each other's thighs. The men, their voices low and husky, discuss their fantasies, their eyes never leaving the curves of their companions.