Megumi is an ordinary housewife. However, when she meets a man online and tells him about the debts she secretly incurred without her husband's knowledge, he offers to pay her a reward and they go on an adulterous trip together. The three-day trip costs 500,000 yen. She lies to her husband and arrives at a hot spring resort. Megumi lets her guard down a little because the man doesn't make a move on her, but he gives her alcohol laced with sleeping pills and she passes out. When she wakes up, she is tied up with rope and unable to move. "Now, the start of three fun days...!"