In the heat of the holiday, boundaries blur. Dylan, the perverted elder brother, can't keep his eyes off Britney's luscious body. She, the eager younger sister, loves the power she holds over him. They play a dangerous game of chicken, their hands inching closer to forbidden zones. The tension builds until it snaps, and they find themselves in a heated, passionate embrace. Clothes are shed, and their bodies entwine, each thrust a celebration of their taboo love, each moan a silent 'Happy Independence Day' from their secret world.