In a twist of fate, a brother and sister find themselves in a compromising position, their bodies pressed together as they attempt to ride a bicycle built for two. Her heart races as she feels his hardness against her, his hands on her waist guiding their movements. With each thrust of the pedals, their bodies rub together, their breathing ragged, their hearts pounding in unison. The line between sibling bond and carnal desire blurs as they give in to their primal urges, their bodies moving in a rhythm as old as time.