A remake of a European and American ethics TV series, originally first broadcast by the British BBC in 2008 and remade by the American ABC in 2013. Four women, an ordinary coffee shop owner, a psychiatrist, a high school teacher, a chief lawyer, and a series of murders... What is the reason, why, who killed him? After the incident, they developed a knot with each other, coupled with their own love and troubles, tying each other together, the process is suffocating.