Blue Diamond (2021)

Kim Yu-yeon begins working as Jung Seo-hyun's maid. Kang Ja-kyeong enters Seo Hi-soo's home as the new tutor. Han Suk-chul collapses at a family dinner. (Source: Netflix)

Han Soo Hyuk and Yu Yeon fall asleep in each other's beds. Guided by Mother Emma, Seo Hyun peers inside her heart to see what and who's inside. (Source: Netflix)

Han Jin Ho is appointed as the company's temporary president. Hi Soo is startled by a suddenly distant Han Ha Joon and an overstepping Ja Kyeong. (Source: Netflix)

Soo-hyuk tries to convince Yu-yeon to return to the Hyowon residence. Uncomfortable with Ja-kyeong's strong attachment to Ha-joon, Hi-soo fires her. (Source: Netflix)

Hi-soo and Seo-hyun look into Ja-kyeong, who's set on reclaiming what was once hers. An article details Ha-joon and Soo-hyuk's family ties. (Source: Netflix)

With news of Hi-soo's pregnancy, Seo-hyun contemplates telling her about Ha-joon's birth mother. Han Ji-yong ousts Ja-kyeong to protect his family. (Source: Netflix)

Hi-soo learns of Ja-kyeong's motive, Yang Soon-hye's involvement and Ji-yong's lies. Seo-hyun faces off against Ji-yong to protect Hyowon. (Source: Netflix)

Hi-soo suffers a devastating loss and recovers in secret. A week later, she returns with renewed resolve to walk out of Hyowon no matter what. (Source: Netflix)

Suk-chul's will is read out loud, revealing the fate of each family member. Ja-kyeong and Hi-soo prepare to take their custody battle to court. (Source: Netflix)

Moved by her conversation with Suzy Choi, Seo-hyun decides to prioritize Soo-hyuk's happiness. Hi-soo catches Ji-yong off guard in the courtroom. (Source: Netflix)

Bound by a common goal and nemesis, an unlikely ally joins Hi-soo’s fight. News of the company heir shakes up the family with a return and a departure. (Source: Netflix)

Hi-soo is caught in a distressing dilemma: escape Hyowon by exposing Ji-yong's evil deeds, or shield Ha-joon from learning the ugly truth? (Source: Netflix)

Seo-hyun prepares to take ownership of both her identity and Hyowon Group. The police investigate suspicions surrounding Ji-yong's death. (Source: Netflix)

In flashbacks, various suspects and their motives are revisited days before the murder. A skeptical detective questions Hi-soo's amnesia. (Source: Netflix)

The detective's distrust of Seo Hyun and Hi Soo grows, despite the family member's ststements that Ji Yong's death was most likely a suicide. (Source: Netflix)

The truth - and what Seo Hyun and Hi Soo desperately wanted to protect - is revealed as events from the night of the murder unfold in its entirety. (Source: Netflix)