Amber and Sarah, petite stepsisters with a mutual love for the 4th of July, transform their family's attic into a fiery den of iniquity. Wearing only their Uncle Sam hats and tiny flag bikinis, they tease each other with innocent patriotism, but their intentions are far from wholesome. Anthony, their stepbrother, joins them, his eyes widening at the sight of their skinny, toned bodies. The trio ignites, their passion burning hotter than any firework, as they engage in a threesome that's as explosive as the holiday they're celebrating.