Bored siblings Mike and Emily, isolated together, can't resist their burgeoning desires. They start with covert masturbation, Emily touching herself, Mike jerking off, each pretending the other isn't there. But when Mike catches Emily mid-act, they argue, and the tension escalates. Soon, they're openly stripping, Mike's thick cock hardening, Emily's pussy glistening. They're about to cross the final line when a sudden noise forces them apart, leaving them breathless and yearning.