Wen Ran, who lived alone, couldn't bear the excessive interruption from Aunt Zhao downstairs who brought sweet and greasy white fungus soup every day, so she secretly poured the soup into the sewer. Two and a half months later, the pipes at home were clogged and an abnormality was discovered during maintenance. Wen Ran noticed something was wrong and began to investigate Aunt Zhao. Finally, he discovered the truth about her strange behavior. With the help of the maintenance master, he collected evidence and teamed up with the police to bring Aunt Zhao to justice. Wen Ran then stayed away from this place and regained a peaceful life.