In the throes of boredom, siblings sneak into the family car, seeking a thrill. As the engine purrs, so do their hormones. She's a vixen in leggings, he's a hormonal teen with a raging hard-on. They start slow, teasing each other with illicit glances and subtle touches. But soon, the windows fog up as they lose themselves in a heated make-out session, hands wandering, bodies pressing. The car rocks gently as they give in to their forbidden desire, the world outside fading away.