In "Mask" Yeon Jung Hoon betrayed Soo Ae and pushed Joo Ji Hoon into a risky situation.
On the 9th episode of SBS Wednesday/Thursday drama "Mask" (script Choi Ho Chul, director Boo Sung Chul, Nam Gun) broadcast on June 25th, Suk Hoon (played by Yeon Jung Hoon) had a scheme that caused Min Woo (played by Joo Ji Hoon) in a risky situation. She had put the book that Suk Hoon had given her in Min Woo's secret room. She found out that there were documents and money that was in there that could push Min Woo to a risky situation.
Nonetheless, Suk Hoon was on top of her head. The prosecutor targeted Min Woo who was under investigation for embezzlement related to Kim Jung Tae. He was charged with having stolen items. With that, the prosecutor started to look all over her house.
At this, Ji Sook got rid of the pieces of evidence that showed they had crafted evidence. Nonetheless, the problematic pieces of medicine came from the book that had been hidden in the secret room. This raised several emergency issues of whether Min Woo should go to the hospital. His mental illness was the main theme as it'll be interesting to see how the family decides to proceed with his medical treatment.