Zhu Li, burdened with severe back pain from the daily fatigue of housework, had a kind husband who worried about her and encouraged her to go to the hospital. However, the busy household chores kept her from doing so. One day, her husband brought a flyer for a business trip massage that had been in the mailbox, advertising it at a very low cost and promising not to charge if it didn't work. With her husband deeply concerned, Zhu Li decided to give the massage a try, unaware that it was a trap set by a despicable masseur, and that she would be completely duped.