Justine (Kirsten Dunst) and Michael (Alexander Skarsgård) are celebrating their marriage at a sumptuous party in the home of her sister Claire (Charlotte Gainsbourg) and brother-in-law John (Kiefer Sutherland). Despite Claire's best efforts, the wedding is a fiasco, with family tensions mounting and relationships fraying.
Meanwhile, a planet called Melancholia is heading directly towards Earth...