The series tells of how World War III is about to break out and a group of multi-millionaires takes refuge in a luxury bunker, called Kimera Underground Park.From within its walls, they will watch as a bewildering spectacle unfolds on various screens and the world they once knew comes crashing down above their heads. And while the situation outside becomes ever more terrifying, they will make the most of their exclusive city, complete with a basketball court, restaurant, zen garden, cocktail bar, shrink’s couch, gym and spa. That is what their privilege will boil down to: just like in the reality TV show Big Brother, they will gradually get accustomed to living (together) in a luxurious hellhole located in a subterranean universe full of enigmas, a place where the unfinished business of two families afflicted by a wound from the past will erupt.