Thread of Lies

Middle-schooler Cheon-jis unexpected suicide causes her mother Hyeon-sook and older sister Man-ji to be driven out of their home and into another apartment. Man-ji happens to hear a story that might relate to the suicide after meeting Cheon-jis friends. Tracking down clues, Man-ji discovers that Cheon-jis best friend Hwa-yeon is behind everything. Searching for the secret behind her sisters death, Man-ji finds out that Cheon-ji left notes in red knitting balls.