1x21 - The Two Sisters

Before Soo Hyang exposes the truth, she passes away due to a heart attack. Do Eun brazenly attends the funeral in a mourning dress, which makes Hye Won and Ji Chang infuriated. Hye Won quickly leaves the funeral after she gets a call from Dan Ung, and Do Eun tries to stop her. Meanwhile, Sung Yoon attends the funeral after hearing the news and runs into Hye Won.