Terrible memories take up the space in a place where all should be happy! Joon-ee and Bi-roo retreat to a lodge in their hometown to have their first child. However, Joon-ee recalls bad memories from the lodge and suffers from the thoughts of Ji-hee, his first love. Meanwhile, Bi-roo discovers traces of strangers in the lodge and strange things begin to happen to her... "I think there's someone in the house...!"