A monotonous sex life with her husband lacking tenderness leads a woman to confide in his younger brother about her daily struggles. One day, while sharing her worries, they accidentally kiss... Although they both try to maintain their composure and not cross any lines while he's still married, she finds herself increasingly drawn to him. Her husband is leaving on a business trip tomorrow, giving them two days alone together before he returns. She can feel herself burning up inside, eager to indulge in this forbidden affair under the pressure of time. Little does she know that her husband won't be aware of what she's been doing with his own brother during his absence.