Ruben Ostlund, two-time winner of the Cannes Film Festival's top prize and last year's jury president, returned to the festival in southern France to launch his next project on Saturday, a dark comedy about being stuck on a plane with no distractions. "The Entertainment System Is Down" will star Kirsten Dunst and Daniel Bruehl as a couple whose relationship is put to the test on the 20-hour-plus plane ride from London to Sydney. "When the iPhones and iPads are shutting out, they are doomed to deal with their own boredom," said Ostlund.