Lady Next Door Who Made an Affair Contract.

Jeong-hye and Ji-hwan are a couple who have been living a wandering life due to debt. Ji-hwan makes a secret deal with Man-soo, the new owner of their previous house. The couple can stay at Man-soo's house, but in exchange, Ji-hwan must have sex with Man-soo's wife, Tae-hee. Man-soo also ends up taunting Jeong-hye secretly, using her unemployed husband as bait. Later, Jeong-hye and Ji-hwan eventually find out that they have been secretly played by the couple and get frustrated. In the end, Man-soo and Tae-hee propose a new offer to the couple.