In a rustic, primal setting, a young, innocent 18-year-old is about to experience her first taste of hardcore pleasure. Her muscular, tattooed stepbrother, a caveman in every sense, can't keep his eyes off her petite, toned body. As they gather around the fire, he reaches out, tracing her soft, virgin skin, igniting a spark within her. She gasps, feeling a sensation she's never known, her pussy dampening at his touch. He guides her hand to his throbbing cock, teaching her the ways of carnal desire in this Stone Age tale of taboo love.