Im Soo-jung wavered at Kim Jun-hwan’s words.

In the April 4 episode of tvN’s drama 'How to Become a Building Owner in South Korea,' Kim Seon (Im Soo-jung) uncovers the truth behind Kim Gyun’s (Kim Nam-gil) death.
At a redevelopment-project party, Min Hwal-seong (Kim Jun-hwan) pulled Seon aside and told her quietly, “Sujong kidnapped Lee Kyung-do and killed my mother-in-law; when I found out, they tried to kill me, too.”
He added that he planned to divorce Jeon I-kyung (Jung Su-jung) and urged Seon to do the same, arguing that with the right plan they could take control of the redevelopment project.
Seon wasn’t convinced. When she replied, “I know the whole situation,” Hwal-seong countered that Gyun was killed while trying to help Sujong prevent the Seyun Building from going to auction.