2x4 - Bitch X Rich

Amidst being mistreated and looked down upon for her memory loss, Hae In seems to make up her mind and asks Do Eon to take her as his partner to the party. Meanwhile, Je Na joins the party and reveals her secret in front of everyone. As the main characters make bold moves, what is the secret that Hae In is hiding? And what kind of consequences will it bring?