The considerable problems she encounters in adapting to her new workplace are compounded by her husband’s decision to leave her and before long she is teetering on the edge of a nervous breakdown. One day, Sonia comes across a gun in one of her pupil’s school bags. Surprised, she grabs it, and, amidst the confusion accidentally fires a shot. The bullet injures her pupil’s leg. In spite of Sonia’s protestations, the commotion soon turns into a veritable hostage drama with all the usual trappings: immediate intervention on the part of the police and politicians, panicking parents, statements from the school’s head and teaching staff, and the arrival of the media in full force. All of which prompts a few people to drop their masks …