"You're the Best Lee Soon Shin" Lee Mi Sook discovers the truth about IU's father and changes completely.

April 27, the 15th episode of the KBS weekend drama "You're the Best Lee Soon Shin" featured Song Mi Ryung (Lee Mi Sook) completely shocked after discovering that Lee Soon Shin (IU) is Lee Chang Hoon's (Jung Dong Hwan) daughter.

Hwang Il Do investigates Lee Soon Shin's family history and finds out that Kim Jung Ae's (Go Doo Shim) husband is Lee Chang Hoon and that Lee Soon Shin is his youngest daughter. In the meantime, Song Mi Ryung makes a deal with a director of a drama to make sure Lee Soon Shin gets a role in the drama.

Hwang Il Do tells Song Mi Ryung, "Do you know who she is? She is dead Chang Hoon's daughter. This is a two way to hell."

Song Mi Ryung begins to drink and says, "Chang Hoon's daughter? This is a scary world."

At the end of this episode, Lee Soon Shin shows up at the audition but is unable to audition because her name is not on the list.

It appears that Song Mi Ryung will begin acting against Lee Soon Shin to make sure she does not succeed as an actress. The preview of the upcoming episode also revealed the completely different attitude of Song Mi Ryung.