A group of coworkers, gathered for a casual slumber party, find themselves in a peculiar situation as yawning becomes contagious. One by one, they succumb to the irresistible urge, their mouths stretching wide, tongues lolling out. As the night progresses, the yawns become more exaggerated, more intimate, and the girls begin to notice the peculiar sensations they evoke in one another. The game of Truth or Dare takes a sudden turn as they dare each other to indulge in their newfound fetish, leading to a night of passionate lesbian encounters, fueled by the unexpected aphrodisiac of contagious yawning.