What if there was a stranger in my house...?
Signals for hide and seek □1○1△2
Sung Soo (Son Hyun Joo), a successful businessman who lives with the perfect family in a
luxury apartment, has secrets and mysophobia about his one and only brother. One day, he
goes to see his brother after a phone call about him missing and sees werid symbols all over
the house and he meets Joo Hee (Moon Jung Hee) who knows his brother.
"Please tell him to stop looking at my daughter."
Joo Hee lives alone with her daughter but lives in fear of someone watching them. Sung Soo
looks around carefully at the old apartment and realizes the symbols mean gender and
numbers of people.
Someone else is living in my apartment with me!
Sung Soo returns to his from his brother's and notices a familiar symbol written next to the
bell of his house. A missing brother. Hide and seeks codes. A shocking truth for two different
families and the struggle to save their families starts now.