Lucas and Charlotte, a married couple, decide to spice up their relationship by engaging in an intense sexual encounter in the sauna. Charlotte, wearing a skimpy bikini, suggests they play a game of who can last longer under the scorching heat. As the minutes tick by, they slowly undress, becoming more and more desperate to reach their goal. Their actions become increasingly raw and degrading, with Lucas even pulling out his phone to record their exploits. In the end, it's Charlotte who succumbs first, unable to handle the combination of heat and pleasure any longer. A victorious Lucas takes a picture of his wife, covered in sweat and embarrassment, before collapsing himself moments later from exhaustion.
