"The Square" is set in a renowned museum where an artist exhibits an installation meant to promote altruism, providing people with a symbolic space where only good things can happen. The movie's protagonist is the manager of the museum who hires a ruthless PR firm to build some buzz around the installation but things get out of hand when the museum's PR team goes too far with their publicity plans, sparking a public uproar and exposing the hypocrisy of the media. Moss will play a reporter who is on the beat of the exhibit.