Sara and Jan are happily married and have four children altogether – three from Sara′s earlier relationships and one from Jan′s first marriage. For Christmas, of all things, Sara decides to invite her former husbands and Jan′s ex-wife together with their respective new partners and children. Jan is anything but delighted about this "Christmas surprise". With good reason, as we soon find out. It does not take long until the gibes and jealousies of the highly dissimilar guests are threatening to turn Christmas Eve into a complete chaos.