As Christmas Eve approaches, a brother and sister find themselves alone, the house filled with the scent of pine and anticipation. The sister, May, suggests a dance, and the brother, eager to please, agrees. As they sway to the music, their bodies pressed close, May feels a stirring she's never felt before. The brother, too, is affected, his breath hitching as he feels his sister's curves. Their eyes meet, and in that moment, the innocence of the season is replaced by a raw, primal desire.