The male protagonist, Wang An , and his newlywed wife, Li Zhi Shan (played by Su Chang), go to a vegetable market. Unexpectedly, while Wang An is borrowing the restroom, the vegetable vendor takes an interest in him. Later that day, after returning home, the vegetable vendor even visits Wang An’s house and starts an affair with Li Zhi Shan, leading to the unexpected development of Wang An's NTR fetish.