A tale of obsession set in 1978 Santiago, Chile. It follows an off-the-rails, impoverished, over-the-hill imitator of John Travolta’s character in “Saturday Night Fever,” who goes to any lengths to win a cash prize and recognition in a dance-like-Travolta TV contest. Meanwhile, tanks rumble through the city’s streets as Pinochet’s regime clamps down on antigovernment activists, including the man’s dance group members.