Chae Ro-un, newly recruited and a little suspicious, has a goal to get through the restricted area and approach Eun Hwan-gi, the secret man covered in a veil.

Hwan-gi finds out the person who outed him was Ro-un; Woo-il gives an unexpected suggestion.

Hwan-gi is caught up in chaos when the penthouse is covered with other people's footprints; he is mistaken as a psychopath, incapable of communicating with others, and is excluded from his employees.

The introverted boss commands an absurd task; the task is to not say anything and to not see anyone; Ro-un digs into the real Hwan-gi.

Revealing the secret behind why Hwan-gi had to become a ghost of the penthouse three years ago.

Hwan-gi's embarrassing presentation video goes out; after creating a mess in the penthouse, all members of Silent Monster are on the verge of getting fired.