Elsa, the older sister, has always been Anna's protector and guide, but now, Anna sees her in a new light. Elsa's icy powers have waned, leaving her vulnerable and human. Anna notices the way Elsa's breath hitches when their hands brush, the way her eyes dilate when Anna bites her lip. Elsa, too, is aware of the shift, the growing tension between them. They dance around each other, their bodies yearning for contact, their breaths coming in sync. The cabin's walls close in, their hearts pounding with a shared, taboo desire.