After graduating from college and starting their careers, Haruna and Shinji went on a hiking trip together to enjoy their favorite outdoor activity. Reflecting on their loving relationship, Shinji proposes to Haruna, deepening their bond. However, on their way down the mountain, they get lost and end up stranded. Seeking help, they are forced to take shelter in a mountain lodge—only to find themselves surrounded by a series of hungry, lustful men who set their sights on the beautiful Haruna. Trapped inside the lodge, the couple is subjected to an endless hell of betrayal, threesomes, creampie gangbangs, and relentless facials.