The "chain reaction" that is the focal point of the movie has its origins in the 1986 Chernobyl disaster. The film's chief protagonist Marta, played by Małgorzata Mikołajczak, and her husband Adam (Tomasz Włosok) plan their wedding. The couple's friend Paweł (Bartosz Gelner), a film director, who after making an irreversible decision sets out an unstoppable set of events.