John Travolta plays Moose, a rabid movie fan who is obsessed with his favourite celebrity action hero, Hunter Dunbar. When he is cheated out of his opportunity to finally meet Hunter, Moose gets help from his friend Leah, a well-connected paparazzi photographer, who knows how to find celebrity homes. Moose turns to stalking to get the fan-to-star interaction he feels he deserves, and while harmless at first, Moose's actions escalate out of control, with devastating consequences for both.