Enigmatic 17-year-old high school student Lee Joo-in is a cheerful friend, a shameless daughter, a mischievous girlfriend, and a person always hard to predict. One day, some words she says in a fit of anger cause a major scene. Afterwards, she receives anonymous notes questioning her behavior, and cracks begin to appear in her formerly peaceful world. Will Joo-in, who wanted nothing more than to protect her world, be able to go back to how things used to be?

Presented at the Toronto International Film Festival.