In 1988, Chilean military dictator Augusto Pinochet, due to international pressure, is forced to call a plebiscite on his presidency. The country will vote ‘Yes’ or ‘No’ to Pinochet extending his rule for another eight years. Opposition leaders for the ‘No’ vote persuade a brash young advertising executive, René Saavedra, to spearhead their campaign. Against all odds, with scant resources and while under scrutiny by the despot’s minions, Saavedra and his team devise an audacious plan to win the election and set Chile free.
Located in Madrid's Plaza del Sol, Km. 0 is the point from which all distances in Spain are measured from the capital. In Km. 0, it is also the meeting point for a gallery of characters. Bored, affluent housewife Marga meets up with gigolo Miguel, who co-habitates with gay Benjamin. Sergio, a soon-to-be-married office clerk who can't wait to lose his virginity, makes the acquaintance of prostitute Tatiana, while gay dancer Bruno meets Maximo. Meanwhile, wannabe director Pedro arranges to meet up with Silvia, an actress who wants to work in musicals directed by Gerardo, and bartender Mario is caught between Amor, who wants to marry him, and her little sister Roma, who is truly in love with him.
Ivan is a kid whose family decides to go back to Chile from New York, after at least a decade away. Ivan of course is not quite the Chilean kid his grandparents would like him to be: he sulks, misses the Opera, finds things odd and ugly, acting like a real "little gringo" (hence the title).