Jung Eunha always thought she had been heal from the pain but it is not the truth. She never heals from the pain that Kim Sojung caused. Jung Yerin is the only person that could see it. Eunha is always on denial, there is nothing you can do to make her realize. 

Kim Sojung finally resurfaced and asked Yerin for a favor. Yerin hated Kim Sojung but maybe this is the only way to save Eunha. Yerin somehow betrays Eunha by giving out her number to Sojung. 

Will Eunha heal her pain or will Eunha make it more painful than it was? Will Eunha forgives Sojung for what she had done