Set in the near future, where certain genetically modified foods have led to a massive increase in multiple births, there isn't enough food to feed the increasing population. To counter this a strict one child policy is enforced; younger siblings are placed in cryosleep to await better times. When Karen Settman dies giving birth to identical septuplets they are raised in secret by their grandfather; he names them after the days of the week. When they are old enough he lets each one out on the day corresponding to their name... on that day they are Karen Settman.
Thirty years pass and 'Karen' is working at a bank. As before each is Karen for their one day. Everything goes well until one day Monday doesn't return home... is she just late or has something happened to her? Tuesday tries to discover what happened but when she too disappears the sisters realise they are in real danger; somebody wants then eliminated. The remaining sisters will have to work together and face danger many times before they learn some shocking truths.
I really enjoyed this dystopian sci-fi; I couldn't help thinking that is was like the series 'Orphan Black' crossed with the classic film 'Soylent Green' without ever feeling like a rip off of either. There are plenty of twists and turns. We get lots of impressive, sometimes gory, action and a real sense of danger for our protagonist sisters. Noomi Rapace is great in the role of all seven sisters; each subtly different in look and behaviour. The supporting cast, which includes Glenn Close and Willem Dafoe are solid too. The film raises interesting questions; if the population continues to grow will limits on children be legally imposed or will it just be accepted that people won't get to eat as much... assuming new farming techniques don't solve the problem first. Overall an impressive film; I'd certainly recommend it to fans of the genre; I'm surprised it isn't better known.