Shen Yi has to deal with Jiang Lin, a roommate who has absolutely no sense of boundaries. Jiang Lin shamelessly uses Shen Yi's washbasin to wash his feet, makes loud phone calls late at night and disturbs everyone, and even takes Shen Yi's razor without permission. To make matters worse, he falsely accuses Shen Yi of stealing. After enduring one injustice after another, Shen Yi finally refuses to put up with it and sets out to get justice for every wrong. With Liu Qiang's help, Jiang Lin's misdeeds are eventually exposed, and he ends up behind bars.