Caoyiping brings us a raw, unfiltered look at incestuous longing. A brother and sister, alone in the house, find themselves drawn to each other's bodies. The sister, frustrated with her brother's lack of respect, storms into the bathroom, only to find him masturbating. Instead of anger, she feels a spark of desire. She joins him, their bodies intertwining as they pleasure themselves. The air grows thick with their moans and the scent of sex. Just as they're about to take it a step further, the sound of the front door opening forces them apart, leaving them breathless and yearning for more.